阅读说明：本技术 热传递组合物、方法和系统 (Heat transfer compositions, methods, and systems ) 是由 迈克尔·彼得森 伊丽莎白·德尔·卡门·维拉贝塞拉 塞缪尔·F·亚娜莫塔 安基特·塞蒂 古斯塔 于 2017-07-27 设计创作，主要内容包括：本申请涉及热传递组合物、方法和系统。本发明公开了制冷剂,所述制冷剂包含至少约97重量％的三种化合物的共混物,所述共混物由以下物质组成：约38重量％至约48重量％的二氟甲烷(HFC-32),约6重量％至约12重量％的五氟乙烷(HFC-125),约33重量％至约41重量％的三氟碘甲烷(CF-3I),以及约2重量％至约16重量％的2,3,3,3-四氟丙烯(HFO-1234yf),其中所述百分比是基于所述共混物中所述三种化合物的总重量的；以及使用所述制冷剂的方法和系统。(The present application relates to heat transfer compositions, methods, and systems. A refrigerant comprising at least about 97% by weight of a blend of three compounds, the blend consisting of: from about 38% to about 48% by weight difluoromethane (HFC-32), from about 6% to about 12% by weight pentafluoroethane (HFC-125), from about 33% to about41% by weight of trifluoroiodomethane (CF) 3 I) And from about 2 to about 16 weight percent 2,3,3, 3-tetrafluoropropene (HFO-1234yf), wherein the percentages are based on the total weight of the three compounds in the blend; and methods and systems for using the refrigerant.)

1. A refrigerant comprising at least about 97% by weight of a blend of three compounds, the blend consisting of:

From about 38% to about 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2,3,3, 3-tetrafluoropropene (HFO-1234yf), wherein the percentages are based on the total weight of the three compounds in the blend.

2. A heat transfer composition comprising the refrigerant of claim 1.

3. A heat transfer composition comprising the refrigerant of claim 1 and a stabilizer composition, wherein the stabilizer composition comprises BHT in an amount from about 0.001 to about 5 percent by weight of the heat transfer composition.

4. A heat transfer composition comprising the refrigerant and stabilizer composition of claim 1, wherein the stabilizer composition comprises farnesene, diphenyl phosphite, and BHT.

5. A method of heating in a heat transfer system including an evaporator, a condenser, and a compressor, the method comprising the steps of: i) condensing the heat transfer composition of any of claims 2 to 4 in the vicinity of a body or article to be heated, and ii) evaporating said composition; wherein the evaporator temperature of the heat transfer system is in the range of about-30 ℃ to about 5 ℃.

6. A method of replacing an existing refrigerant contained in a heat transfer system, the method comprising removing at least a portion of the existing refrigerant from the system, the existing refrigerant being R-410A, and replacing at least a portion of the existing refrigerant by introducing the refrigerant of claim 1 or the heat transfer composition of any of claims 2-4 into the system.

7. A heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and the heat transfer composition of any of claims 2 to 4 in the system, the condenser having an operating temperature of from about +20 ℃ to about +70 ℃ and the evaporator having an operating temperature of from about-40 ℃ to about +10 ℃.

8. Use of a heat transfer composition according to any of claims 2 to 4 in a refrigeration system.

9. Use of a polyol ester (POE) as a lubricant in a heat transfer composition.

10. Stabilizer compositions comprising farnesene, diphenyl phosphite and/or BHT.

Technical Field

The present invention relates to compositions, methods and systems having utility in heat exchange systems, including air conditioning and refrigeration applications, and in particular aspects to compositions useful in heat transfer systems of the type heretofore using refrigerant R-104A, i.e., as a replacement for refrigerant R410A for heating and cooling applications, and to retrofit heat exchange systems, including systems designed for R410A.

Background

Mechanical refrigeration systems and related heat transfer devices such as heat pumps and air conditioners, using refrigerant liquids are well known in the art for industrial, commercial and domestic use. Chlorofluorocarbons (CFCs) were the refrigerants of this system developed in the 30's of the 20 th century. However, since the 80's of the 20 th century, the impact of CFCs on the stratospheric ozone layer has been the focus of attention. In 1987, Montreal protocol was signed by some national governments to protect the global environment and schedule the phase-out of CFC products. CFCs are replaced by more environmentally friendly hydrogen-containing materials, namely Hydrochlorofluorocarbons (HCFCs).

One of the most commonly used hydrochlorofluorocarbon refrigerants is chlorodifluoromethane (HCFC-22). However, subsequent amendments to the montreal protocol accelerated the phase-out of CFCs and also planned the phase-out of HCFCs, including HCFC-22.

To meet the demand for non-flammable, non-toxic alternatives to CFCs and HCFCs, the industry has developed a wide variety of Hydrofluorocarbons (HFCs) with zero ozone depletion potential. R410A (a 50: 50w/w blend of difluoromethane (HFC-32) and pentafluoroethane (HFC-125)) was used as an industrial replacement for HCFC-22 in air conditioning and freezer applications because it does not contribute to ozone depletion. However, R410A is not a simple substitute for R22. Thus, replacing R-22 with R-410A requires redesign of the major components within the heat exchange system, including replacement and redesign of the compressor, to accommodate the higher operating pressure and volumetric capacity of R410A when compared to R-22.

While R-410A has a more acceptable Ozone Depletion Potential (ODP) than R-22, continuing to use R-410A is problematic because it has a high global warming potential of 2088. Thus, there is a need in the art to replace R-410A with a more environmentally friendly alternative.

It is understood in the art that it is highly desirable that alternative heat transfer fluids have a difficult to achieve performance mosaic, including excellent heat transfer characteristics, particularly well-matched to the needs of a particular application, chemical stability, low or no toxicity, non-flammability, lubricant miscibility and/or lubricant compatibility, among others. Furthermore, any substitute for R410A is preferably well matched to the operating conditions of R410A to avoid modifications or redesigns to the system. Developing a heat transfer fluid that meets all of these requirements, many of which are unpredictable, is a significant challenge.

With respect to efficiency and usage, it is important to note that as the demand for electrical energy increases, the loss of refrigerant thermodynamic performance or energy efficiency can lead to increased use of fossil fuels. Thus, the use of such refrigerants can have negative secondary environmental effects.

Flammability is considered to be an important and, in some cases, essential characteristic of many heat transfer applications. Thus, it is often beneficial to use compounds in such non-flammable compositions. As used herein, the term "non-flammable" refers to a composition that is determined to be non-flammable according to ASTM E681-2009 test procedures as claimed in ASHRAE standard 34-2013 and described in appendix B1 of ASHRAE standard 34-2013.

It is critical for maintaining system efficiency and proper and reliable functioning of the compressor that the lubricant circulating in the vapor compression heat transfer system be returned to the compressor to perform its intended lubricating function. Otherwise, lubricant may accumulate and stagnate in the coils and pipes of the system, including the heat transfer components. In addition, when lubricant accumulates on the inner surfaces of the evaporator, it reduces the heat exchange efficiency of the evaporator, thereby reducing the efficiency of the system.

R-410A is currently used with polyol ester (POE) lubricants in air conditioning applications because R-410A is miscible with POE at the temperatures experienced during use of such systems. However, R-410A is immiscible with POE at temperatures typically experienced during operation of cryogenic refrigeration systems and heat pump systems. Therefore, unless measures are taken to mitigate this immiscibility, POE and R-410A cannot be used in cryogenic refrigeration or heat pump systems.

It would therefore be desirable to provide compositions that can be used as R-410A substitutes in air conditioning applications. The ability to use the compositions of the present invention in, for example, heat pump and cryogenic refrigeration systems is an additional benefit, but it does not have the disadvantage of being POE immiscible at the temperatures experienced during operation of these systems.

The present invention provides a refrigerant that is useful as a replacement for R410A and exhibits a desirable combination of properties, i.e., excellent heat transfer characteristics, chemical stability, low or no toxicity, non-flammability, lubricant miscibility, and/or lubricant miscibility in combination with acceptable Global Warming Potential (GWP).

United states patent application2006/0243945 describes a number of heat transfer compositions as potential replacements for several refrigerants previously used in various applications. Among the disclosed compositions, several compositions comprise HFC-32, HFC-125, HFO-1234yf and trifluoroiodomethane (CF)₃I) (see Table 11 for the 5 th entry from the last entry to the 11 th entry from the last entry in the table). However, none of the compositions with all four components have an HFC-32 amount of less than 50 wt%. Further, all compositions disclosed have an HFC-125 level of 10% or less. As explained below, the applicant has surprisingly found that the formulation of these four-component refrigerant compositions enables an important and highly desirable combination of properties to be achieved, provided that the components are present in specific amounts and/or relative proportions. However, none of the compositions disclosed in the' 945 publication contain these four components in amounts that meet the following requirements: amounts required to meet preferred aspects of the invention; and/or an important weight ratio as described herein required to achieve one or more of the unexpected properties achieved in accordance with preferred aspects of the invention described herein.

U.S.2013/0119299 discloses refrigerant compositions based on three components: (i) a first component selected from the group consisting of trans-1, 3, 3, 3-tetrafluoropropene (R-1234ze (E)), cis-1, 3, 3, 3-tetrafluoropropene (R-1234ze (Z)), and mixtures thereof; (ii) carbon dioxide (CO)₂Or R-744); and (iii) a third component selected from difluoromethane (R-32), 1, 1, 1, 2-tetrafluoroethane (R-134a), and mixtures thereof. The present application discloses that R-1234ze must be present in the composition in an amount of at least about 5% by weight, CO2 is preferably present in an amount of from about 4% to about 30% by weight, and when the third component is R-32, it is present in an amount of from 5% to less than 30% by weight. The present patent application shows that additional compounds may be included, such as 2, 3, 3, 3-tetrafluoropropene (R-1234yf), 3, 3, 3-trifluoropropene (R1243zf), 1, 1-difluoroethane (R-152a), fluoroethane (R-161), 1, 1, 1-trifluoropropane (R-263fb), 1, 1, 1, 2, 3-pentafluoropropane (R-245eb), propene (R-1270), propane (R-290), n-butane (R-600), isobutane (R-600a), ammonia (R-717) and the likeA mixture of (a). This patent application also discloses that refrigerant R-125 may also be included, but does not disclose the use of any particular amount. The present application also discloses possible uses of flame retardants selected from the group consisting of tris- (2-chloroethyl) -phosphate, (chloropropyl) phosphate, tris- (2, 3-dibromopropyl) -phosphate, tris- (1, 3-dichloropropyl) -phosphate, diammonium phosphate, various halogenated aromatic compounds, antimony oxide, aluminium trihydrate, polyvinyl chloride, fluorinated iodocarbons, fluorinated bromocarbons, trifluoroiodomethanes, perfluoroalkyl amines, bromo-fluoroalkyl amines and mixtures thereof. Although the present application also indicates that the disclosed compositions may be used as low GWP alternatives for many existing refrigerants, such as R-134a, R-152a, R-1234yf, R-22, R-410A, R-407A, R-407B, R-407C, R507, and R-404a, it does not identify any particular composition that is specifically used as an alternative to R-410 a.

Disclosure of Invention

The applicants have unexpectedly found that refrigerant compositions containing the components in relative amounts and/or relative proportions according to the present invention overcome one or more of the disadvantages of the existing refrigerants described herein, and/or achieve unexpected combinations of results not achieved according to any of the compositions described above, including results in particular heat transfer systems and heat transfer methods.

According to the present invention, there is provided a refrigerant comprising:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant comprises at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant comprises at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant comprises at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The applicant has found that the refrigerant compositions of the present invention very preferably use one or more and preferably all of the following components in weight ratios in order to achieve very advantageous and unexpected advantages:

(a) a weight ratio of (HFC-32+ HFO-1234yf) to (CF3I + HFC-125) of from greater than about 1: 1 to less than 1.2: 1, preferably from greater than about 1.1: 1 to about 1.18: 1; and

(b) HFC-32: HFC-125 weight ratios of greater than 3.5: 1 to about 4: 1, preferably from about 3.8: 1 to about 3.9: 1.

For convenience, the weight ratio of (HFC-32+ HFO-1234yf) to (CF3I + HFC-125) will be referred to herein as the "HFC 32HFO1234 yf: CF3IHFC125 ratio".

For convenience, the HFC-32: HFC-125 weight ratio is referred to herein as the "HFC 32 f: HFC125 ratio".

Thus, according to the present invention there is provided a refrigerant comprising:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant comprises at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

From about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, HFC32HFO1234 yf: CF3IHFC125 ratio, and (b) HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant comprises at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant comprises at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (i) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (ii) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

For all refrigerant compositions disclosed herein, it is preferred that the weight ratio of the total weight of HFC-32 in the composition to HFC-125 in the composition is greater than 3.5: 1 and less than 5: 1, even more preferably greater than 3.7: 1 and less than 4.5: 1, with a ratio of about 4: 1 highly preferred, and a ratio of HFC 32: HFC125 of about 4: 1 even more preferred.

For all refrigerant compositions disclosed herein, preferably the HFC32HFO1234 y: CF3IHFC125 ratio is greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, with a ratio of about 1.17: 1 being highly preferred.

For all refrigerant compositions disclosed herein, preference is given to HFC-32 in the composition and CF in the composition₃The weight ratio of I is greater than 1.25: 1 and less than 1.4: 1, evenMore preferably greater than 1.3: 1 and less than 1.4: 1, with a ratio of about 1.34: 1 being highly preferred.

One unexpected result achieved by the preferred embodiments of the present invention is the unexpected ability of the composition to achieve a highly desirable combination of properties at one time. In particular, the compositions of the present invention using one or more of the ratios described herein and the amounts of the components described herein (one or both, preferably both) have the following characteristics:

(a) is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and described in annex B1 of ASHRAE standard 34-2013; and is

(b) A Global Warming Potential (GWP) of less than 750.

According to the present invention there is provided a refrigerant comprising at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

According to the present invention there is provided a refrigerant comprising at least about 98.5% by weight of a blend of the following three compounds, wherein the following percentages are based on the total weight of the three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

According to the present invention there is provided a refrigerant comprising at least about 99.5% by weight of a blend of the following three compounds, wherein the following percentages are based on the total weight of the three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

According to the present invention there is provided a refrigerant comprising at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

According to the present invention there is provided a refrigerant comprising at least about 98.5% by weight of a blend of the following three compounds, wherein the following percentages are based on the total weight of the three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

According to the present invention there is provided a refrigerant comprising at least about 99.5% by weight of a blend of the following three compounds, wherein the following percentages are based on the total weight of the three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant consists essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant consists essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant consists essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

According to the present invention, there is provided a refrigerant consisting essentially of at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

According to the present invention, there is provided a refrigerant consisting essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

According to the present invention, there is provided a refrigerant consisting essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

According to the present invention, there is provided a refrigerant consisting essentially of at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

According to the present invention, there is provided a refrigerant consisting essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

According to the present invention, there is provided a refrigerant consisting essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following three compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

Preferably, the refrigerant comprises at least about 97 weight percent of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant comprises at least about 98.5 weight percent of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant comprises at least about 99.5 weight percent of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant consists essentially of at least about 97 weight percent of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant consists essentially of at least about 98.5 weight percent of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant consists essentially of at least about 99.5 weight percent of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Applicants have discovered that preferred refrigerants of the present invention are capable of providing a combination of two or more heat transfer characteristics, chemical stability, low or no toxicity, non-flammability and/or lubricant compatibility, in combination with an acceptable Global Warming Potential (GWP), particularly advantageous characteristics in combination with the use as a replacement for R-410A, as described above and below.

Preferably, the refrigerant consists essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant consists essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant consists essentially of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists essentially of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Thus, the refrigerant of the present invention consists essentially of: from about 38% to 48% by weight difluoromethane (HFC-32), preferably from about 46% to 48% by weight difluoromethane (HFC-32), more preferably about 47% by weight difluoromethane (HFC-32).

Further, the refrigerant consists essentially of: from about 6% to about 12% by weight of pentafluoroethane (HFC-125), preferably from about 11% to about 12% by weight of pentafluoroethane (HFC-125), more preferably about 12% by weight of pentafluoroethane.

Further, the refrigerant consists essentially of: from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) Preferably from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) More preferably about 35% by weight of trifluoroiodomethane (CF)₃I)。

Further, the refrigerant consists essentially of: from about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), preferably from about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), more preferably about 6 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant consists of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

More preferably, the refrigerant consists of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the refrigerant consists of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

More preferably, the refrigerant consists of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

For the purposes of the present invention, the term "about" in relation to amounts expressed as weight percent means that the amount of a component can vary by an amount of +/-2 weight percent, preferably +/-1 weight percent, more preferably +/-0.5 weight percent.

For the purposes of the present invention, the term "about" in relation to the HFC32HFO1234 yf: CF3IHFC125 ratio means that the value may vary by an amount of +/-0.01, preferably +/-0.005.

For the purposes of the present invention, the term "about" in relation to the HFC 32: HFC125 ratio means that the value may vary by an amount of +/-0.1, preferably +/-0.05.

By temperature, the term "about" means that the temperature can vary by an amount of +/-5 ℃, preferably +/-2 ℃, and more preferably +/-1 ℃, most preferably +/-0.5 ℃.

A particular advantage of the refrigerants of the present invention is that they are non-flammable when tested according to the ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Flammability is defined as the ability of a composition to ignite and/or propagate a flame. The skilled artisan will appreciate that flammability of the refrigerant is an important feature for heat transfer applications. Accordingly, it would be desirable in the art to provide refrigerant compositions that are useful as replacements for R410A, that have excellent heat transfer characteristics, chemical stability, low or no toxicity, lubricant miscibility, and/or lubricant compatibility, and that remain non-flammable in use. The refrigerant of the present invention meets this need.

A refrigerant may be incorporated into the heat transfer composition.

Accordingly, the present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having the important features of being immediately provided in the system and/or integrated with the process, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Accordingly, the present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having the important features of being immediately provided in the system and/or integrated with the process, the refrigerant:

(a) Has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) Has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) Has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) Has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) Has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process; and is

(c) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process; and is

(c) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process; and is

(c) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

From about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process; and is

(c) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process; and is

(c) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013. Such refrigerants consist essentially of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process;

(c) is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013;

(d) generating a compressor discharge temperature in the system and/or method that is no greater than 10 ℃ greater than the compressor discharge temperature of R-410A; and is

(e) The compressor pressure ratio generated in the system and/or method is from about 95% to about 105% of the compressor pressure ratio of R-410A. Such refrigerants consist essentially of:

From about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process;

(c) is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013;

(d) generating a compressor discharge temperature in the system and/or method that is no greater than 10 ℃ greater than the compressor discharge temperature of R-410A; and is

(e) The compressor pressure ratio generated in the system and/or method is from about 95% to about 105% of the compressor pressure ratio of R-410A. Such refrigerants consist essentially of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5% to about 7% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process;

(c) is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013;

(d) Generating a compressor discharge temperature in the system and/or method that is no greater than 10 ℃ greater than the compressor discharge temperature of R-410A; and is

(e) The compressor pressure ratio generated in the system and/or method is from about 95% to about 105% of the compressor pressure ratio of R-410A. Such refrigerants consist essentially of:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) Has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process;

(c) is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013;

(d) generating a compressor discharge temperature in the system and/or method that is no greater than 10 ℃ greater than the compressor discharge temperature of R-410A; and is

(e) The compressor pressure ratio generated in the system and/or method is from about 95% to about 105% of the compressor pressure ratio of R-410A. Such refrigerants consist essentially of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1.

The present invention provides heat transfer compositions, methods and systems for use in heat transfer systems with a refrigerant R-410A having important features that are immediately provided in the system and/or integrated with the method, the refrigerant:

(a) has an efficiency (COP) of about 95% to about 105%, preferably about 100% to about 105%, of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of from about 95% to about 105%, preferably from about 98% to about 105%, of the capacity of R410A in the system and/or used in the process;

(c) is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013;

(d) generating a compressor discharge temperature in the system and/or method that is no greater than 10 ℃ greater than the compressor discharge temperature of R-410A; and is

(e) The compressor pressure ratio generated in the system and/or method is from about 95% to about 105% of the compressor pressure ratio of R-410A. Such refrigerants consist essentially of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234 yf).

Preferably, the heat transfer composition comprises the refrigerant in an amount greater than about 40% by weight of the heat transfer composition, or greater than about 50% by weight of the heat transfer composition, or greater than about 70% by weight of the heat transfer composition, or greater than about 80% by weight or greater than about 90% by weight. The heat transfer composition can consist essentially of a refrigerant.

The heat transfer compositions of the present invention may contain other components in order to enhance or provide certain functions of the composition. These other components or additives may include one or more of lubricants, dyes, solubilizers, compatibilizers, stabilizers, antioxidants, corrosion inhibitors, extreme pressure additives, and anti-wear additives.

The heat transfer compositions of the present invention particularly comprise a refrigerant and a stabilizer as described above. Examples of preferred stabilizers include diene-based compounds and/or phenol-based compounds and/or phosphorus compounds and/or nitrogen compounds and/or epoxides selected from the group consisting of aromatic epoxides, alkyl epoxides, alkenyl epoxides. The stabilizing agent is preferably provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.01% to about 2% by weight, more preferably from about 0.1% to about 1% by weight. By weight is meant in each case the weight of the heat transfer composition.

Diene-based compounds include C3 to C15 dienes, as well as compounds formed by the reaction of any two or more C3 to C4 dienes. Preferably, the diene-based compound is selected from the group consisting of allyl ethers, allenes, butadienes, isoprenes, and terpenes. The diene-based compound is preferably a terpene including, but not limited to, rutinene, retinal, erodimenol, terpinene, delta 3-carene, terpinolene, phellandrene, myrcene, farnesene, pinene, nerol, citral, camphor, menthol, limonene, nerolidol, phytol, carnosic acid, and vitamin a₁. Preferably, the stabilizer is farnesene.

Preferred terpene stabilizers are disclosed in U.S. provisional patent application No. 60/638,003, filed 12.12.2004, which is incorporated herein by reference.

The diene-based compound may be provided in the heat transfer composition in an amount of from about 0.001 wt.% to about 10 wt.%, preferably from about 0.01 wt.% to about 5 wt.%, more preferably from about 0.1 wt.% to about 2.5 wt.%, and even more preferably from about 1 wt.% to about 2.5 wt.%. By weight is meant in each case the weight of the heat transfer composition.

The diene-based compound may be provided in the heat transfer composition in an amount of from about 0.001 wt.% to about 5 wt.%, preferably from about 0.01 wt.% to about 2 wt.%, more preferably from about 0.1 wt.% to about 1 wt.%. By weight is meant in each case the weight of the heat transfer composition.

The diene-based compound is preferably provided in combination with a phosphorus compound.

The phosphorus compound may be a phosphite or phosphate compound. For the purposes of the present invention, the phosphite compounds may be diaryl, dialkyl, triaryl and/or trialkyl phosphites, in particular one or more compounds selected from the group consisting of hindered phosphites, tris (di-tert-butylphenyl) phosphite, di-n-octyl phosphite, isodecyl diphenyl phosphite, triphenyl phosphite and diphenyl phosphites, in particular diphenyl phosphite.

The phosphate compound may be a triaryl phosphate, trialkyl phosphate, alkyl mono-acid phosphate, aryl di-acid phosphate, amine phosphate, preferably triaryl phosphate and/or trialkyl phosphate, especially tri-n-butyl phosphate.

Preferably, the stabilizer comprises farnesene and diphenyl phosphite.

The phosphorus compound may be provided in the heat transfer composition in an amount of from about 0.001 wt.% to about 10 wt.%, preferably from about 0.01 wt.% to about 5 wt.%, and even more preferably from about 0.1 wt.% to about 2.5 wt.%, and even more preferably from about 1 wt.% to about 2.5 wt.%. By weight is meant in each case the weight of the heat transfer composition.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) HFC32HFO1234 yf: CF3IHFC125 ratios of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) HFC 32: HFC125 ratios of greater than 3.5: 1 to about 4: 1, and stabilizer compositions comprising terpene and phosphorus compounds. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) HFC32HFO1234 yf: CF3IHFC125 ratios of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) HFC 32: HFC125 ratios of greater than 3.5: 1 to about 4: 1, and stabilizer compositions comprising terpene and phosphorus compounds. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) HFC32HFO1234 yf: CF3IHFC125 ratios of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) HFC 32: HFC125 ratios of greater than 3.5: 1 to about 4: 1, and stabilizer compositions comprising terpene and phosphorus compounds. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those comprising a blend consisting essentially of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those comprising a blend consisting essentially of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) HFC32HFO1234 yf: CF3IHFC125 ratios of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) HFC 32: HFC125 ratios of greater than 3.5: 1 to about 4: 1, and stabilizer compositions comprising terpene and phosphorus compounds. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those comprising a blend consisting essentially of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those comprising a blend consisting essentially of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those comprising a blend consisting essentially of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

about 34 wt% to about 36 wt%% of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) HFC32HFO1234 yf: CF3IHFC125 ratios of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) HFC 32: HFC125 ratios of greater than 3.5: 1 to about 4: 1, and stabilizer compositions comprising terpene and phosphorus compounds. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

The heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those comprising a blend consisting essentially of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a terpene and a phosphorus compound. The phosphorus compound is preferably selected from phosphates or phosphites. Preferably, the stabilizer composition comprises a terpene and a phosphite, more preferably farnesene and diphenyl phosphite.

Preferably, the heat transfer composition comprises a refrigerant as described above and a stabilizer composition comprising farnesene and a phosphorus compound selected from a diaryl phosphite, a dialkyl phosphite, a triaryl phosphate or a trialkyl phosphate, more preferably diphenyl phosphite and/or tri-n-butyl phosphate. More preferably, the heat transfer composition comprises a refrigerant as described herein and a stabilizer composition comprising farnesene and one or more of a diaryl phosphite or a dialkyl phosphite, more preferably diphenyl phosphite.

Alternatively or in addition, the stabilizer is a nitrogen compound. For the purposes of the present invention, the nitrogen compound may be one or more compounds selected from dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene and TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ]. Preferably, the stabilizer is dinitrobenzene.

Alternatively or additionally, the nitrogen compound comprises an amine-based compound. For the purposes of the present invention, the amine-based compound may be one or more secondary or tertiary amines selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine. For the purposes of the present invention, the amine-based compound may be an amine antioxidant, such as a substituted piperidine compound, i.e. a derivative of an alkyl-substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl, in particular selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.) of one or more amine antioxidants. For the purposes of the present invention, the amine-based compound may be an alkyl diphenylamine, such as bis (nonylphenylamine) or a dialkylamine, such as (N- (1-methylethyl) -2-propylamine alternatively or additionally, the amine-based compound may be phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) ) And bis (nonylphenyl) amine. The amine-based compound is preferably one or more of phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl-alpha-naphthylamine (PANA).

The nitrogen compound may be provided in the heat transfer composition in an amount of from about 0.001 wt.% to about 10 wt.%, preferably from about 0.01 wt.% to about 5 wt.%, more preferably from about 0.1 wt.% to about 2.5 wt.%, and even more preferably from about 1 wt.% to about 2.5 wt.%. By weight is meant in each case the weight of the heat transfer composition.

In addition, the nitrogen compound may be provided in the heat transfer composition in an amount of from about 0.001 wt.% to about 5 wt.%, preferably from about 0.01 wt.% to about 2 wt.%, more preferably from about 0.1 wt.% to about 1 wt.%. By weight is meant in each case the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants, such as substituted piperidine compounds, i.e. derivatives of alkyl-substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl, selected from2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

In addition, the nitrogen compound may be provided in the heat transfer composition in an amount of from about 0.001 wt.% to about 5 wt.%, preferably from about 0.01 wt.% to about 2 wt.%, more preferably from about 0.1 wt.% to about 1 wt.%. By weight is meant in each case the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF) ₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and 1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyldiphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamineOr phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, preferably phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl-alpha-naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine, and bistallow amineAmine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; Amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyldiphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, preferably phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl-alpha-naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyl amine Di-and di-tallow amines, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group ]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants, such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone,2, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethaneNitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group ]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl)) Sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidinyl succinate; alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine and hydroxylamines, such as tallow amine, methylbistallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and containing nitrogen compoundsA fixative composition, the nitrogen compound is selected from dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayz omicron) and1770(Mayzo Co.); alkyldiphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylAmines, or phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl-alpha-naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group ]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate; alkylated p-phenylenediamines, such as N-phenyl-N' - (1, 3-dimethyl-butyl) -p-phenylene-diaminePhenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine and hydroxylamines, such as tallow amine, methylbistallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants, such as substituted piperidine compounds, i.e. alkyl-substituted piperidines, piperazinones orDerivatives of alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and stabilizer groups containing nitrogen compoundsA compound selected from dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy group ]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyldiphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthaleneAmines (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants, such as substituted piperidine compounds I.e. derivatives of alkyl-substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound, the processThe nitrogen compound is selected from dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amines, preferably phenyl- α -naphthylamine (PANA), alkyl-phenyl- α -naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl- α -naphthylamine (PANA).

Further, the heat transfer compositions of the present invention comprise refrigerants in accordance with any of the refrigerants described herein, but preferably those refrigerants consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a nitrogen compound selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ] group]A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamine, and hydroxylamines, such as tallow amine, methyltallow amine and bistallow amine, or phenol-alpha-naphthylamine or 765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyldiphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl-alpha-naphthylamine (PANA),Alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, preferably phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, more preferably phenyl-alpha-naphthylamine (PANA).

Alternatively or in addition, the stabilizer comprises a phenol, preferably a hindered phenol. For the purposes of the present invention, a phenol may be one or more compounds selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

The phenolic compound may be provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.01% to about 2% by weight, more preferably from about 0.1% to 1% by weight. By weight is meant in each case the weight of the heat transfer composition.

Alternatively, the phenolic compound may be provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.005% to about 2% by weight, more preferably from about 0.01% to about 1% by weight. By weight is meant in each case the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF3I), and

about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF3I), and

about 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising a phenolic compound selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

Alternatively or in addition, the stabilizer comprises a phenol, preferably a hindered phenol. For the purposes of the present invention, a phenol may be one or more compounds selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

BHT may be provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.01% to about 2% by weight, more preferably from about 0.1% to 1% by weight. By weight is meant in each case the weight of the heat transfer composition.

Alternatively, the BHT may be provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.005% to about 2% by weight, more preferably from about 0.01% to about 1% by weight. By weight is meant in each case the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF) ₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (ii) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35 weight percent% of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF) ₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

From about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF) ₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 wt% to about 16 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (C)F₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35Weight% of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 wt.% of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist essentially of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Further, the heat transfer compositions of the present invention comprise a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants that consist of at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition consisting essentially of farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition.

Each heat transfer composition of the present invention as defined above may additionally comprise a lubricant. Generally, the heat transfer composition comprises a lubricant in an amount from about 5% to 60% by weight of the heat transfer composition, preferably from about 10% to about 60% by weight of the heat transfer composition, preferably from about 20% to about 50% by weight of the heat transfer composition, alternatively from about 20% to about 40% by weight of the heat transfer composition, alternatively from about 20% to about 30% by weight of the heat transfer composition, alternatively from about 30% to about 50% by weight of the heat transfer composition, alternatively from about 30% to about 40% by weight of the heat transfer composition. The heat transfer composition may comprise a lubricant in an amount of from about 5% to about 10% by weight of the heat transfer composition, preferably about 8% by weight of the heat transfer composition.

Common refrigerant lubricants used in refrigeration machinery such as polyol esters (POE), polyalkylene glycols (PAG), silicone oils, mineral oils, Alkylbenzenes (AB), polyvinyl ethers (PVE), and poly (alpha-olefins) (PAO) may be used with the refrigerant composition of the present invention.

Preferably, the lubricant is selected from polyol esters (POE), polyalkylene glycols (PAG), mineral oils and Alkyl Benzenes (AB), more preferably from polyol esters (POE), polyalkylene glycols (PAG) and mineral oils, in particular from polyol esters (POE) and polyalkylene glycols (PAG).

Commercially available mineral oils include Witco LP 250 (registered trademark) from Witco (Witco), Suniso 3GS from Witco (Witco), and Calumet R015 from carlmett (Calumet). Commercially available alkylbenzene lubricants include Zerol 150 (registered trademark) or Zerol 300 (registered trademark) from rifu chemical limited. Commercially available esters include neopentyl glycol dipelargonate, under the trade names Emery 2917 (registered trade mark) and Hatcol 2370 (registered trade mark). Other useful esters include phosphate esters, dibasic acid esters, and fluoro esters.

For the purposes of the present invention, the heat transfer composition may comprise a refrigerant and stabilizer composition as disclosed above and a lubricant selected from polyol esters (POE), polyalkylene glycols (PAG), mineral oil, Alkylbenzenes (AB) and polyvinyl ethers (PVE), more preferably from polyol esters (POE), mineral oil, Alkylbenzenes (AB) and polyvinyl ethers (PVE), in particular from polyol esters (POE), mineral oil and Alkylbenzenes (AB), most preferably from polyol esters (POE). Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably a refrigerant comprising at least about 97 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1, and from about 10 wt.% to about 60 wt.% of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

About 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and stabilizer compositions comprising BHT in an amount from about 0.001 to about 5 weight percent based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and stabilizer compositions comprising BHT in an amount from about 0.001 to about 5 weight percent based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and stabilizer compositions comprising BHT in an amount from about 0.001 to about 5 weight percent based on the weight of the heat transfer composition,

And polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF) ₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

And from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising BHT in an amount from about 0.001 wt% to about 5 wt% based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) leap slip agent.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

And polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2% to about 16% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition, and BHT is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition,

And polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2% to about 16% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition, and BHT is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 38% to 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2% to about 16% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition, and BHT is provided in an amount from about 0.001% to about 5% by weight based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF) ₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and polyol ester (POE) lubricants.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

And from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition,

and from about 10% to about 60% by weight of a polyol ester (POE) lubricant.

In the case where the composition of the present invention is provided for use in mobile air conditioners, the lubricant is a polyol ester (POE) lubricant or a polyalkylene glycol lubricant. Alternatively, when the composition of the present invention is provided for stationary air conditioning applications, the lubricant is preferably a polyol ester, alkylbenzene or mineral oil, more preferably a polyol ester. The heat transfer compositions of the present invention can consist essentially of or consist of a refrigerant, a stabilizer composition, and a lubricant as described herein.

It has been surprisingly found that the refrigerant compositions of the present invention are miscible with POE lubricants over a desired and broad temperature range (e.g., temperatures of about-40 ℃ to +80 ℃). This allows the refrigerant and heat transfer compositions of the present invention to be used in a wider variety of heat transfer applications than R410A. For example, the refrigerant and heat transfer compositions of the present invention can be used in refrigeration, air conditioning and heat pump applications.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

From about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

From about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1, and from about 10% to about 60% by weight of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein when the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein when the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, the mixture has a liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

The present invention may also include a heat transfer composition as described herein, wherein the lubricant is present in an amount of 20 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has one liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

The present invention may also include a heat transfer composition as described herein, wherein the lubricant is present in an amount of 50 weight percent relative to the total amount of refrigerant and lubricant, and wherein the mixture has one liquid phase at least one temperature in the range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

About 34 to about 36 weight percent of trisFluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

And a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF3I), and

from about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

From about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 97% by weight of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

And a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 98.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃1) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise refrigerants in accordance with any of the refrigerants described herein, but preferably are those refrigerants that comprise at least about 99.5 weight percent of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those refrigerants consisting essentially of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

Preferred heat transfer compositions comprise a refrigerant according to any of the refrigerants described herein, but preferably are those consisting of a blend of the following four compounds, wherein the following percentages are based on the total weight of the following four compounds:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane(CF₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

and about 10 to 60 weight percent of a polyol ester (POE) lubricant; wherein the lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

The present invention may also include a heat transfer composition as described hereinafter wherein the lubricant is present in an amount of 20% by weight relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

The present invention may also include a heat transfer composition as described hereinafter wherein the lubricant is present in an amount of 50 weight percent relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to +80 ℃.

In a particularly preferred feature of the invention, the heat transfer composition comprises a refrigerant as described above, and a POE lubricant, wherein the lubricant is present in an amount of 5 wt.%, relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to-25 ℃ and/or in the range of +50 ℃ to +80 ℃.

In a particularly preferred feature of the invention, the heat transfer composition comprises a refrigerant as described above, and a POE lubricant, wherein the lubricant is present in an amount of 20 wt.%, relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to-25 ℃ and/or in the range of +50 ℃ to +80 ℃.

In a particularly preferred feature of the invention, the heat transfer composition comprises a refrigerant as described above, and a POE lubricant, wherein the lubricant is present in an amount of 50 wt.%, relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase at least one temperature in the range of-40 ℃ to-25 ℃ and/or in the range of +50 ℃ to +80 ℃.

In an alternative particularly preferred feature of the invention, the heat transfer composition comprises a refrigerant as described above, and a POE lubricant, wherein the lubricant is present in an amount of 5 wt.%, relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to-25 ℃ and/or +50 ℃ to +80 ℃.

In an alternative particularly preferred feature of the invention, the heat transfer composition comprises a refrigerant as described above, and a POE lubricant, wherein the lubricant is present in an amount of 20 wt.%, relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to-25 ℃ and/or +50 ℃ to +80 ℃.

In an alternative particularly preferred feature of the invention, the heat transfer composition comprises a refrigerant as described above, and a POE lubricant, wherein the lubricant is present in an amount of 50 wt% relative to the total amount of refrigerant and lubricant, and wherein the mixture has a liquid phase in the temperature range of-40 ℃ to-25 ℃ and/or +50 ℃ to +80 ℃.

Other additives not mentioned herein may also be considered by those skilled in the art in view of the teachings contained herein without departing from the novel and essential characteristics of the present invention.

Combinations of surfactants and solubilizers may also be added to the compositions of the present invention to aid in oil solubility, as disclosed in U.S. Pat. No. 6,516,837, the disclosure of which is incorporated by reference.

Applicants have found that the compositions of the present invention are capable of achieving a combination of properties that are difficult to achieve, including a particularly low GWP. Accordingly, the compositions of the present invention have a Global Warming Potential (GWP) of not greater than about 1500, preferably not greater than about 1000, more preferably not greater than about 750. In a particularly preferred feature of the invention, the compositions of the present invention have a Global Warming Potential (GWP) of not greater than about 750.

In addition, the compositions of the present invention have a low Ozone Depletion Potential (ODP). Thus, the compositions of the present invention have an Ozone Depletion Potential (ODP) of no greater than 0.05, preferably no greater than 0.02, more preferably about zero.

In addition, the compositions of the present invention exhibit acceptable toxicity, and preferably have an Occupational Exposure Limit (OEL) of greater than about 400.

The heat transfer compositions disclosed herein are provided for use in heat transfer applications, including air conditioning, refrigeration, and heat pumps.

Any reference to the heat transfer compositions of the present invention refers to each and any heat transfer composition as described herein. Thus, for the following discussion of the use or application of the heat transfer compositions of the present invention, the heat transfer composition can comprise or consist essentially of any of the refrigerants described herein.

For purposes of the present invention, each and any heat transfer composition as described herein can be used in a heat transfer system, such as an air conditioning system, a refrigeration system, or a heat pump. A heat transfer system according to the present invention may include a compressor, an evaporator, a condenser, and an expansion device in communication with one another.

Examples of common compressors for purposes of this invention include reciprocating, rotary (including rolling pistons and rotating vanes), scroll, screw, and centrifugal compressors. Accordingly, the present invention provides each and any refrigerant and/or heat transfer composition as described herein for use in heat transfer systems including reciprocating, rotary (including rolling piston and rotating vane), scroll, screw or centrifugal compressors.

Examples of commonly used expansion devices for the purposes of the present invention include capillary tubes, fixed orifices, thermal expansion valves, and electronic expansion valves. Accordingly, the present invention provides each and any refrigerant and/or heat transfer composition as described herein for use in a heat transfer system comprising a capillary tube, a fixed orifice, a thermal expansion valve, or an electronic expansion valve.

For the purposes of the present invention, the evaporator and the condenser together form a heat exchanger, preferably selected from the group consisting of finned tube heat exchangers, microchannel heat exchangers, shell-and-tube heat exchangers, plate heat exchangers and double-tube heat exchangers. Accordingly, the present invention provides each and any refrigerant and/or heat transfer composition for use in a heat transfer system as described herein, wherein the evaporator and condenser together form a finned tube heat exchanger, a microchannel heat exchanger, a shell and tube heat exchanger, a plate heat exchanger, or a tube-in-tube heat exchanger.

The heat transfer compositions of the present invention are useful in heating and cooling applications.

In particular features of the invention, the heat transfer composition can be used in a cooling process that includes condensing the heat transfer composition and subsequently evaporating the composition in the vicinity of an article or body to be cooled.

Accordingly, the present invention relates to a method of cooling in a heat transfer system comprising an evaporator, a condenser, and a compressor, the method comprising i) condensing a heat transfer composition as described herein; and

ii) evaporating the composition in the vicinity of the body or article to be cooled;

wherein the evaporator temperature of the heat transfer system is in the range of about-40 ℃ to +10 ℃.

Accordingly, the present invention relates to a method of heating in a heat transfer system comprising an evaporator, a condenser and a compressor, the method comprising i) condensing a heat transfer composition as described herein in the vicinity of a body or article to be heated

And

ii) evaporating the composition; wherein the evaporator temperature of the heat transfer system is in the range of about-30 ℃ to about 5 ℃

Alternatively or in addition, the heat transfer composition can be used in a heating process that includes condensing the heat transfer composition in the vicinity of an article or body to be heated and subsequently evaporating the composition.

The heat transfer compositions of the present invention are provided for use in air conditioning applications, including mobile and stationary air conditioning applications. Thus, any of the heat transfer compositions described herein can be used in any of the following applications:

air-conditioning applications, including mobile air-conditioning, in particular automotive air-conditioning,

-a mobile heat pump, in particular an electric vehicle heat pump;

coolers, in particular positive displacement coolers, more particularly air-or water-cooled direct expansion coolers, which may be modular, or may be conventional individual packages,

residential air conditioning systems, in particular ducted or ductless, split air conditioning systems,

-a residential heat pump,

-a residential air-water heat pump/circulation system,

industrial air conditioning system

-commercial air conditioning systems, in particular encapsulated rooftop units and Variable Refrigerant Flow (VRF) systems;

-commercial air, water or ground source heat pump systems.

The heat transfer compositions of the present invention are provided for use in refrigeration systems. The term "refrigeration system" refers to any system or apparatus or any part or portion of such a system or apparatus that employs a refrigerant to provide cooling. Thus, any of the heat transfer compositions described herein can be used in any of the following applications:

-a cryogenic refrigeration system for producing a cryogenic refrigerant,

-a medium-temperature refrigeration system,

-a commercial cold-storage machine,

-a commercial freezer, the freezer being,

-an ice-making machine,

-a vending machine for vending a product from a vending machine,

-a transport refrigeration system for the transport of refrigerant,

-a domestic freezer,

-a domestic cold-storage machine,

-an industrial freezer, the freezer being,

-an industrial refrigerator, and

-a cooler.

Each of the heat transfer compositions described herein is particularly provided for use in residential air conditioning systems (evaporator temperatures in the range of from about 0 ℃ to about 10 ℃, particularly about 7 ℃ for cooling, and/or in the range of from about-20 ℃ to about 3 ℃, particularly about 0.5 ℃ for heating). ). Alternatively or additionally, each of the heat transfer compositions described herein is specifically provided for use in residential air conditioning systems having reciprocating, rotary (rolling piston or rotating vane) or scroll compressors.

Each of the heat transfer compositions described herein is particularly provided for use in air-cooled chillers (evaporator temperatures in the range of about 0 ℃ to about 10 ℃, particularly about 4.5 ℃), particularly air-cooled chillers having a positive displacement compressor, and more particularly air-cooled chillers having a reciprocating scroll compressor.

Each of the heat transfer compositions described herein is particularly provided for use in residential air-to-hydrothermal pump cycle systems (evaporator temperatures in the range of about-20 ℃ to about 3 ℃, particularly about 0.5 ℃, or evaporator temperatures in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃).

Each of the heat transfer compositions described herein is particularly provided for use in medium temperature refrigeration systems (evaporator temperatures in the range of from about-12 ℃ to about 0 ℃, particularly about-8 ℃).

Each of the heat transfer compositions described herein is particularly provided for use in a cryogenic refrigeration system (wherein the evaporator temperature is in the range of from about-40 ℃ to about-12 ℃, particularly about-32 ℃).

Accordingly, the heat transfer compositions of the present invention are provided for use in residential air conditioning systems for providing cool air to a building, such as during the summer months (the air having a temperature of, for example, from about 10 ℃ to about 17 ℃, particularly about 12 ℃). Typical types of systems are split, mini-split and window, ducted split, ductless split, window and portable air conditioning systems. The system typically has an air-refrigerant evaporator (indoor coil), a compressor, an air-refrigerant condenser (outdoor coil), and an expansion valve. The evaporator and condenser are typically round tube plate fins, finned tubes, or microchannel heat exchangers. The compressor is typically a reciprocating or rotary (rolling piston or rotating vane) or scroll compressor. The expansion valve is typically a capillary tube expansion valve, a thermal expansion valve or an electronic expansion valve. The refrigerant evaporation temperature is preferably in the range of 0 ℃ to 10 ℃. The condensation temperature is preferably in the range of 40 ℃ to 70 ℃.

The heat transfer composition of the present invention is provided for use in a residential heat pump system for providing warm air (said air having a temperature of, for example, from about 18 ℃ to about 24 ℃, particularly about 21 ℃) to a building during the winter season. It is typically the same system as a residential air conditioning system, and in heat pump mode, the refrigerant flow is reversed, the indoor coil becomes the condenser, and the outdoor coil becomes the evaporator. Typical system types are split and small split heat pump systems. The evaporator and condenser are typically round tube sheet fins, fins or microchannel heat exchangers. The compressor is typically a reciprocating or rotary (rolling piston or rotating vane) or scroll compressor. The expansion valve is typically a thermal expansion valve or an electronic expansion valve. The refrigerant evaporation temperature is preferably in the range of about-20 ℃ to about 3 ℃ or about-30 ℃ to about 5 ℃. The condensation temperature is preferably in the range of about 35 ℃ to about 50 ℃.

The heat transfer compositions of the present invention are provided for use in commercial air conditioning systems, which may be chillers (which water has a temperature of, for example, about 7 ℃) that are used to provide chilled water to large buildings, such as offices and hospitals. Depending on the application, the chiller system may operate throughout the year. The chiller system may be air-cooled or water-cooled. The air-cooled cooler generally has a plate-type, double-pipe type or shell-and-tube type evaporator for supplying cooling water, a reciprocating or scroll compressor for exchanging heat with ambient air, a round tube plate fin, a finned tube or microchannel condenser, and a thermal expansion valve or an electronic expansion valve. Water cooled systems typically have a shell and tube evaporator for providing cooling water, reciprocating, scroll, screw or centrifugal compressors, shell and tube condensers for exchanging heat with water from cooling towers or lakes, the ocean and other natural resources, and thermal or electronic expansion valves. The refrigerant evaporation temperature is preferably in the range of about 0 ℃ to about 10 ℃. The condensation temperature is preferably in the range of about 40 ℃ to about 70 ℃.

The heat transfer compositions of the present invention are provided for use in residential air-to-hydrothermal pump cycle systems for providing heated air (the water being at a temperature of, for example, about 50 ℃ or about 55 ℃) to buildings for use in floor heating or similar applications in winter. The circulation system typically has a round tube plate fin, a finned tube or a microchannel evaporator for exchanging heat with ambient air, a reciprocating, scroll or rotary compressor, a plate, tube-in-tube or shell-and-tube condenser for heating water, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is preferably in the range of about-20 ℃ to about 3 ℃ or-30 ℃ to about 5 ℃. The condensation temperature is preferably in the range of about 50 ℃ to about 90 ℃.

The heat transfer compositions of the present invention are provided for use in medium temperature refrigeration systems, preferably for cooling food or beverages, such as in refrigerators or bottled beverage coolers. The system typically has an air-refrigerant evaporator for cooling the food or beverage, a reciprocating, scroll, or screw or rotary compressor, an air-refrigerant condenser for exchanging heat with ambient air, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is preferably in the range of about-12 ℃ to about 0 ℃. The condensation temperature is preferably in the range of about 40 ℃ to about 70 ℃, or about 20 ℃ to about 70 ℃.

The heat transfer composition of the present invention is provided for use in a cryogenic refrigeration system, wherein the cryogenic refrigeration system is preferably for a freezer or an ice cream machine. The system typically has an air-refrigerant evaporator for cooling the food or beverage, a reciprocating, scroll or rotary compressor, an air-refrigerant condenser for exchanging heat with ambient air, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is preferably in the range of about-40 ℃ to about-12 ℃. The condensation temperature is preferably in the range of about 40 ℃ to about 70 ℃ or about 20 ℃ to about 70 ℃.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

about 34 wt% to about 36 wt%Amount% of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

Wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1, wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

From about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF) ₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weightTrifluoroiodomethane (CF) of₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

Wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

About 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

Wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; all in the cooler.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; all in the cooler.

For the purposes of the present invention, a heat transfer composition as described above is provided for use in a cooler having an evaporation temperature in the range of from about 0 ℃ to about 10 ℃, and a condensation temperature in the range of from about 40 ℃ to about 70 ℃. The cooler is provided for air conditioning or refrigeration, preferably for refrigeration. The cooler is preferably a positive displacement cooler, more particularly an air-cooled or water-cooled direct expansion cooler, which may be modular or may be a conventional single package.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

Wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1, wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

From about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 wt% to about 7 wt% 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1,

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (, HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weightTrifluoroiodomethane (CF) of₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and 10 to 60 weight percent of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and 10 to 60 weight percent of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and 10 to 60 weight percent of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and 10 to 60 weight percent of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and 10 to 60 weight percent of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

Wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in stationary air conditioners, in particular residential air conditioners, industrial air conditioners or commercial air conditioners.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein percentages are based on the total weight of the four compounds in the blend; wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein percentages are based on the total weight of the four compounds in the blend; wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

from about 46 to 48 weight percent difluoromethane (HFC-32),

From about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) (ii) a And

from about 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf), wherein percentages are based on the total weight of the four compounds in the blend; wherein the refrigerant composition has: (a) an HFC32HFO1234 yf: CF3IHFC125 ratio of greater than about 1: 1 to less than 1.2: 1, preferably greater than about 1.1: 1 to about 1.18: 1, and (b) an HFC 32: HFC125 ratio of greater than 3.5: 1 to about 4: 1; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend, and 10 to 60 weight percent of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF) ₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 98.5% by weight of a blend of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

About 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting essentially of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF) ₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

Accordingly, the present invention provides the use of a heat transfer composition comprising a refrigerant consisting of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

Wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; in commercial refrigeration, in particular in commercial refrigerators, commercial freezers, ice makers or vending machines.

The heat transfer compositions disclosed herein are provided as low Global Warming Potential (GWP) replacements for refrigerant R-410A. Thus, the heat transfer composition can be used in a method of retrofitting an existing heat transfer system designed for use with or containing an R-410A refrigerant without requiring substantial engineering modifications to the existing system, particularly without requiring modifications to the condenser, evaporator, and/or expansion valve.

Accordingly, a method of retrofitting an existing heat transfer system designed to contain or contain R-410A refrigerant or adapted for use with R-410A refrigerant is provided, the method comprising replacing at least a portion of the existing R-410A refrigerant with a heat transfer composition of the refrigerant of the present invention.

Alternatively, the heat transfer composition can be used in a method of retrofitting an existing heat transfer system designed to contain or contain R410A refrigerant, wherein the system is modified for use with the refrigerant of the present invention.

Alternatively, the heat transfer composition can be used in a heat transfer system suitable for use with R410A refrigerant.

It is to be understood that when the heat transfer composition is used as a low global warming replacement for R-410A, or in a method for retrofitting an existing heat transfer system designed to contain or contain R410A refrigerant, or in a heat transfer system suitable for use with R410A refrigerant, the heat transfer composition can consist essentially of the refrigerant of the present invention. Alternatively, the invention encompasses the use of the refrigerants of the invention as a low global warming replacement for R-410A, or a method for retrofitting an existing heat transfer system designed to contain or contain R410A refrigerant, or in a heat transfer system suitable for use with R410A refrigerant as described herein.

Those skilled in the art will appreciate when the heat transfer composition is provided as a means for retrofitting an existing heat transfer system as described above,

As described above, the method includes removing at least a portion of the existing R410A refrigerant from the system. Preferably, the method comprises removing at least about 5%, about 10%, about 25%, about 50%, or about 75% by weight of R410A from the system and replacing it with the heat transfer composition of the present invention.

The heat transfer compositions of the present invention may be used in systems used or adapted for use with R410A refrigerants, such as existing, new or newly designed heat transfer systems.

The compositions of the present invention exhibit many of the desirable characteristics of R-410A, but have a GWP that is much lower than that of R-410A, while having an operating characteristic, i.e., capacity and/or efficiency (COP), that is substantially similar to or substantially matches that of R-410A, and preferably as high as or higher than that of R-410A. This allows the claimed composition to replace R410A in existing heat transfer systems without requiring any significant system modifications to, for example, condensers, evaporators, and/or expansion valves. Thus, the composition can be used as a direct replacement for retrofit heat exchange systems that have been used with R410A or are suitable for use with R410A.

The compositions of the present invention therefore preferably exhibit handling characteristics compared to R410A, wherein:

-the efficiency (COP) of the composition is 95% to 105% of the efficiency of R410A; and/or

-a capacity of 95% to 105% of the capacity of R410A.

In heat transfer systems wherein the compositions of the present invention are used in place of R410A refrigerant.

Preferably, the compositions of the present invention preferably exhibit handling characteristics compared to R-410A, wherein:

-the efficiency (COP) of the composition is from 100% to 105% of the efficiency of R-410A; and/or

-a capacity of 98% to 105% of the capacity of R-410A.

In heat transfer systems wherein the compositions of the present invention are used in place of R-410A refrigerant.

The term "COP" is a measure of energy efficiency and represents the ratio of refrigeration or cooling capacity to the energy demand of the refrigeration system (i.e., the energy to run the compressor, fan, etc.). COP is the useful output of a refrigeration system, in this case the refrigeration capacity or amount of cooling provided divided by the power required to obtain this output. In essence, it is a measure of the efficiency of the system.

The term "capacity" is the amount of cooling provided by the refrigerant in a refrigeration system, in BTU/h. This is determined experimentally by multiplying the change in enthalpy of the refrigerant as it passes through the evaporator (in BTU/lb) by the mass flow of the refrigerant. Enthalpy can be determined by measuring the pressure and temperature of the refrigerant. The capacity of a refrigeration system relates to the ability to maintain an area to be cooled at a particular temperature.

The term "mass flow rate" is the amount of refrigerant in pounds per pound that passes through a conduit of a given size for a given amount of time.

In order to maintain the reliability of the heat transfer system, it is preferred that the composition of the present invention further exhibits the following characteristics compared to R410A:

-the exhaust temperature is no more than 10 ℃ higher than the exhaust temperature of R410A; and/or

-a compressor pressure ratio of 95% to 105% of the compressor pressure ratio of R410A,

in heat transfer systems wherein the compositions of the present invention are used in place of R410A refrigerant.

It is to be understood that R410A is an azeotrope-like composition. Thus, in order to match the claimed compositions well with the operating characteristics of R410A, the claimed compositions advantageously exhibit low levels of slip. Thus, the claimed composition of the invention can provide evaporator glide of less than 2 ℃, preferably less than 1.5 ℃.

The existing heat transfer compositions used with R-410A are preferably air conditioning heat transfer systems, including both mobile and stationary air conditioning systems. Thus, each heat transfer composition as described herein can be used in place of R-410A in any of the following applications:

Air conditioning systems, including mobile air conditioning systems, particularly automotive air conditioning systems,

mobile heat pumps, in particular electric vehicle heat pumps;

chillers, particularly positive displacement chillers, and more particularly air-cooled or water-cooled direct expansion chillers, may be modular, may be conventional individually packaged,

residential air conditioning systems, particularly ducted or ductless split air conditioning systems,

a residential heat pump that is capable of operating in a residential environment,

a residential air-water heat pump/cycle system,

an industrial air conditioning system, and

commercial air conditioning systems, particularly packaged rooftop units and Variable Refrigerant Flow (VRF) systems;

-commercial air, water or ground source heat pump systems.

Alternatively, the compositions of the present invention are provided to replace R410A in refrigeration systems. Thus, each heat transfer composition as described herein can be used in place of R410A in any of the following applications:

-a cryogenic refrigeration system for producing a cryogenic refrigerant,

-a medium-temperature refrigeration system,

-a commercial cold-storage machine,

-a commercial freezer, the freezer being,

-an ice-making machine,

-a vending machine for vending a product from a vending machine,

-a transport refrigeration system for the transport of refrigerant,

-a domestic freezer,

-a domestic cold-storage machine,

-an industrial freezer, the freezer being,

-an industrial refrigerator, and

-a cooler.

Each of the heat transfer compositions described herein is specifically provided for use in a residential air conditioning system in place of R-410A (where the evaporator temperature is in the range of from about 0 ℃ to about 10 ℃, specifically about 7 ℃ for cooling, and/or in the range of from about-20 ℃ to about 3 ℃ or from about-30 ℃ to about 5 ℃, specifically about 0.5 ℃ for heating). Alternatively or additionally, each of the heat transfer compositions described herein is specifically provided for use in place of R-410A in residential air conditioning systems having reciprocating, rotary (rolling piston or rotary vane) or scroll compressors. Each of the heat transfer compositions described herein is particularly provided for use in place of R410A in an air-cooled chiller (wherein the evaporator temperature is in the range of about 0 ℃ to about 10 ℃, particularly about 4.5 ℃), particularly an air-cooled chiller having a positive displacement compressor, more particularly an air-cooled chiller having a reciprocating scroll compressor.

Each of the heat transfer compositions described herein is specifically provided for use in place of R410A in a residential air-to-hydrothermal pump cycle system (where the evaporator temperature is in the range of about-20 ℃ to about 3 ℃, or in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃).

Each of the heat transfer compositions described herein is specifically provided for use in place of R410A in medium temperature refrigeration systems in which the evaporator temperature is in the range of from about-12 ℃ to about 0 ℃, specifically about-8 ℃.

Each of the heat transfer compositions described herein is specifically provided for use in place of R410A in a cryogenic refrigeration system wherein the evaporator temperature is in the range of about-40 ℃ to about-12 ℃, specifically about-32 ℃.

Accordingly, there is provided a method of retrofitting an existing heat transfer system designed to contain or contain an R-410A refrigerant or adapted for use with an R-410A refrigerant, the method comprising replacing at least a portion of the existing R-410A refrigerant with a heat transfer composition comprising a refrigerant comprising at least about 97% by weight of a blend of four compounds, the blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

About 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend;

and optionally a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Accordingly, there is provided a method of retrofitting an existing heat transfer system designed to contain or contain an R-410A refrigerant or adapted for use with an R-410A refrigerant, the method comprising replacing at least a portion of the existing R-410A refrigerant with a heat transfer composition comprising a refrigerant comprising at least about 98.5 weight percent of a blend of four compounds, the blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

About 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend;

and optionally a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Accordingly, there is provided a method of retrofitting an existing heat transfer system designed to contain or contain R-410A refrigerant or adapted for use with R-410A refrigerant, said method comprising replacing at least a portion of the existing R-410A refrigerant with a heat transfer composition comprising a refrigerant comprising at least about 99.5% by weight of a blend of four compounds, said blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

About 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend;

and optionally a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

Accordingly, there is provided a method of retrofitting an existing heat transfer system designed to contain or contain R-410A refrigerant or adapted for use with R-410A refrigerant, the method comprising replacing at least a portion of the existing R-410A refrigerant with a heat transfer composition comprising a refrigerant, the refrigerant comprising a blend of four compounds, the blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

About 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend;

and optionally a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition.

The present invention also provides a heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and a heat transfer composition in the system, the heat transfer composition comprising a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants comprising at least about 97% by weight of the following four compounds, the blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF) ₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, BHT is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and 10 wt% to 60 wt% of a polyol ester (POE) lubricant,

the condenser has an operating temperature of +20 ℃ to +70 ℃ and the evaporator has an operating temperature of-40 ℃ to +10 ℃.

The present invention also provides a heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and a heat transfer composition in said system, said heat transfer composition comprising a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants comprising at least about 98.5% by weight of the following four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, BHT is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and 10 wt% to 60 wt% of a polyol ester (POE) lubricant,

the condenser has an operating temperature of +20 ℃ to +70 ℃ and the evaporator has an operating temperature of-40 ℃ to +10 ℃.

The present invention also provides a heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and a heat transfer composition in said system, said heat transfer composition comprising a refrigerant according to any of the refrigerants described herein, but preferably those refrigerants comprising at least about 99.5% by weight of the following four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, BHT is provided in an amount from about 0.001 wt% to about 5 wt%, based on the weight of the heat transfer composition, and 10 wt% to 60 wt% of a polyol ester (POE) lubricant,

the condenser has an operating temperature of +20 ℃ to +70 ℃ and the evaporator has an operating temperature of-40 ℃ to +10 ℃.

The present invention also provides a heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and a heat transfer composition in said system, said heat transfer composition comprising a refrigerant according to any of the refrigerants described herein, but preferably those consisting essentially of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; the condenser has an operating temperature of +20 ℃ to +70 ℃ and the evaporator has an operating temperature of-40 ℃ to +10 ℃.

The present invention also provides a heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and a heat transfer composition in said system, said heat transfer composition comprising a refrigerant according to any of the refrigerants described herein, but preferably those consisting of four compounds, said blend consisting of:

About 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the four compounds in the blend; and a stabilizer composition comprising farnesene, diphenyl phosphite and/or BHT, wherein farnesene is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, diphenyl phosphite is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and BHT is provided in an amount of from about 0.001% to about 5% by weight, based on the weight of the heat transfer composition, and 10% to 60% by weight of a polyol ester (POE) lubricant; the condenser has an operating temperature of +20 ℃ to +70 ℃ and the evaporator has an operating temperature of-40 ℃ to +10 ℃.

The heat transfer system is preferably an air conditioning system such as a mobile air conditioning system, in particular a car air conditioning system; mobile heat pumps, in particular electric vehicle heat pumps; chillers, particularly positive displacement chillers, more particularly air-cooled or water-cooled direct expansion chillers, which may be modular or may be conventionally packaged individually; residential air conditioning systems, particularly ducted or ductless split air conditioning systems; a residential heat pump; residential air-water heat pump/circulation systems; an industrial air conditioning system; commercial air conditioning systems, particularly packaged rooftop and Variable Refrigerant Flow (VRF) systems; and commercial air, water or ground source heat pump systems.

In particular, the heat transfer system is a residential air conditioning system (evaporator temperature in the range of about 0 ℃ to about 10 ℃, in particular about 7 ℃ for cooling, and/or in the range of about-20 ℃ to about 3 ℃ or in the range of about-30 ℃ to about 5 ℃, in particular about 0.5 ℃ for heating).

In particular, the heat transfer system is an air-cooled chiller (evaporator temperature in the range of about 0 ℃ to about 10 ℃, particularly about 4.5 ℃), particularly an air-cooled chiller having a positive displacement compressor, more particularly an air-cooled chiller having a reciprocating or scroll compressor.

In particular, the heat transfer system is a residential air-to-water heat pump cycle system (evaporator temperature in the range of about-20 ℃ to about 3 ℃, or in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃).

The heat transfer system may be a refrigeration system, such as a cryogenic refrigeration system, a moderate temperature refrigeration system, a commercial refrigerator, a commercial freezer, an ice maker, a vending machine, a transport refrigeration system, a home freezer, a home refrigerator, an industrial freezer, an industrial refrigerator, and a chiller.

In particular, the heat transfer system is a medium temperature refrigeration system (evaporator temperature in the range of about-12 ℃ to about 0 ℃, particularly about-8 ℃).

In particular, the heat transfer system is a cryogenic refrigeration system (evaporator temperature in the range of about-40 ℃ to about-12 ℃, particularly about-23 ℃).

Detailed Description

The ability of the refrigerant compositions of the present invention to match the operating conditions of R-410A is illustrated by the following non-limiting examples:

examples

The following refrigerant compositions were evaluated for performance in a number of refrigeration systems.

HFC-32, HFC-125, CF are produced in the amounts shown in Table 1 below₃I and HFO-1234yf to produce a refrigerant.

Each composition was subjected to thermodynamic analysis to determine its ability to match the operating characteristics of R-410A in various refrigeration systems. The analysis was performed using experimental data collected for the properties of the binary pairs. CF has been studied in a series of binary pairs using HFC-32, HFC-125 and HFO-1234yf₃Gas-liquid equilibrium behavior of I. In experimental evaluation, the composition of each binary pair varied between 0% and 100%. The mixture parameters for each binary pair were regressed to experimentally obtained data and the parameters were also incorporated into the National Institute of Science and Technology (NIST) reference fluid thermodynamic and transport properties database (Refprop 9.1 NIST standard database, 2013). The standard mixing parameters already in Refprop 9.1 are used for other binary pairs. Assumptions for the analysis were as follows: the compressor displacement is the same for all refrigerants, the operating conditions are the same for all refrigerants, and the compressor isentropic and volumetric efficiencies are the same for all refrigerants.

Table 1: refrigerant evaluated for performance embodiment

Table 2: characteristics of refrigerants 1 to 4

Example 1: residential air-conditioning system (Cooling)

Description of the invention：

Residential air conditioning systems are used to provide cool air (about 12 ℃) to buildings during the summer months. Typical types of systems are split, mini-split, and window air conditioning systems. The system typically has an air-refrigerant evaporator (indoor coil), a compressor, an air-refrigerant condenser (outdoor coil), and an expansion valve. The evaporator and condenser are typically round tube sheet fins or microchannel heat exchangers. The compressor is typically a reciprocating or rotary (rolling piston or scroll) compressor. The expansion valve is typically a thermal expansion valve or an electronic expansion valve. The refrigerant evaporation temperature is in the range of about 0 ℃ to about 10 ℃, and the condensation temperature is in the range of about 40 ℃ to about 70 ℃.

Operating conditions：

1. The condensation temperature is 46 ℃, and the corresponding outdoor environment temperature is 35 DEG C

2. Local cooling of condenser 5.5 deg.C

3. The evaporation temperature is 7 ℃, and the corresponding indoor environment temperature is 26.7 DEG C

4. The degree of superheat of the evaporator is 5.5 DEG C

5. The isentropic efficiency is 70 percent

6. The volumetric efficiency is 100%

7. The temperature rise of the suction pipeline is 5.5 DEG C

Table 3: performance of residential air conditioning system (Cooling)

Table 3 shows the thermodynamic performance of the residential air conditioning system compared to the R410A system.

Compositions 1 through 4 showed 95% or higher capacity (accounting for ± 2% uncertainty) and efficiency of matching compared to R410A. This indicates that the system performance is similar to R410A.

Compositions 1 to 4 exhibited a pressure ratio of 99% compared to R410A. This indicates that the compressor efficiency is similar to R410A and no modifications to the R410A compressor are required.

Compositions 1 through 4 showed an increase in exhaust temperature within 10 ℃ compared to R410A. This indicates good compressor reliability and no risk of oil breakdown or motor burnout.

Compositions 1 to 4 showed evaporator glide of less than 2 ℃. This indicates that evaporator slippage does not affect system performance.

Example 2: residential heat pump system (heating)

Description of the invention：

Residential heat pump systems are used to provide warm air (about 21 ℃) to buildings during the winter season. It is typically the same system as a residential air conditioning system, however, when the system is in heat pump mode, the refrigerant flow is reversed, the indoor coil becomes the condenser and the outdoor coil becomes the evaporator. Typical system types are split and small split heat pump systems. The evaporator and condenser are typically round tube sheet fins or microchannel heat exchangers. The compressor is typically a reciprocating or rotary (rolling piston or scroll) compressor. The expansion valve is typically a thermal expansion valve or an electronic expansion valve. The refrigerant evaporation temperature is in the range of about-20 ℃ to about 3 ℃, and the condensation temperature is in the range of about 35 ℃ to about 50 ℃.

Operating conditions：

1. The condensation temperature is 41 ℃, and the corresponding indoor environment temperature is 21.1 DEG C

2. Local cooling of condenser 5.5 deg.C

3. The evaporation temperature is 0.5 deg.C, and the corresponding outdoor temperature is 8.3 deg.C

4. The degree of superheat of the evaporator is 5.5 DEG C

5. The isentropic efficiency is 70 percent

6. The volumetric efficiency is 100%

7. The temperature rise of the suction pipeline is 5.5 DEG C

Table 4: performance of residential heat pump system (heating)

Table 4 shows the thermodynamic performance of the residential heat pump system compared to the R410A system.

Compositions 1 to 4 showed 95% capacity (taking into account 2% uncertainty) and efficiency of matching compared to R410A. This indicates that the system performance is similar to R410A.

Compositions 1 to 4 exhibited a pressure ratio of 99% compared to R410A. This indicates that the compressor efficiency is similar to R410A and no modifications to the R410A compressor are required.

Compositions 1 through 4 are shown at 10 compared to R410AThe exhaust temperature rises within deg.c. This indicates good compressor reliability and no risk of oil breakdown or motor burnout.

Compositions 1 to 4 showed evaporator glide of less than 2 ℃. This indicates that evaporator slippage does not affect system performance.

Example 3: commercial air conditioning system-cooler

Description of the invention：

Commercial air conditioning systems (chillers) are used to provide chilled water (about 7 ℃) to large buildings such as offices, hospitals, and the like. Depending on the application, the chiller system may operate throughout the year. The chiller system may be air-cooled or water-cooled. The air-cooled cooler generally has a plate-type or shell-and-tube type evaporator for supplying cooling water, a reciprocating or scroll compressor for exchanging heat with ambient air, a round tube plate fin or a micro-channel condenser, and a thermal expansion valve or an electronic expansion valve. Water cooled systems typically have a shell and tube evaporator for providing cooling water, a reciprocating or scroll compressor for exchanging heat with water from a cooling tower or lake, ocean and other natural resources, a shell and tube condenser, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is in the range of about 0 ℃ to about 10 ℃, and the condensation temperature is in the range of about 40 ℃ to about 70 ℃.

Operating conditions：

1. The condensation temperature is 46 ℃, and the corresponding outdoor environment temperature is 35 DEG C

2. Local cooling of condenser 5.5 deg.C

3. The evaporation temperature is 4.5 ℃, and the corresponding cooling leaving water temperature is 7 DEG C

4. The degree of superheat of the evaporator is 5.5 DEG C

5. The isentropic efficiency is 70 percent

6. The volumetric efficiency is 100%

7. The temperature rise of the suction pipeline is 2 DEG C

Table 5: commercial air conditionerPerformance-air-cooled cooler for a conditioning system

Table 5 shows the thermodynamic performance of a commercial air-cooled chiller system compared to the R410A system.

Compositions 1 through 4 showed 95% or higher capacity (accounting for ± 2% uncertainty) and efficiency of matching compared to R410A. This indicates that the system performance is similar to R410A.

Compositions 1 to 4 exhibited a pressure ratio of 99% compared to R410A. This indicates that the compressor efficiency is similar to R410A and no modifications to the R410A compressor are required.

Compositions 1 through 4 showed an increase in exhaust temperature within 10 ℃ compared to R410A. This indicates good compressor reliability and no risk of oil breakdown or motor burnout.

Compositions 1 to 4 showed evaporator glide of less than 2 ℃. This indicates that evaporator slippage does not affect system performance.

Example 4: residential air-water heat pump circulating system

Description of the invention：

Residential air-to-water heat pump circulation systems are used to supply hot water (about 50 ℃) to buildings for floor heating or similar applications in winter. The circulation system typically has a round tube sheet fin or microchannel evaporator for exchanging heat with ambient air, a reciprocating or rotary compressor, a plate condenser for heating water, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is in the range of about-20 ℃ to about 3 ℃, and the condensation temperature is in the range of about 50 ℃ to about 90 ℃.

Operating conditions：

1. The condensation temperature is 60 ℃, and the corresponding indoor leaving water temperature is 50 DEG C

2. Local cooling of condenser 5.5 deg.C

3. The evaporation temperature is 0.5 deg.C, and the corresponding outdoor temperature is 8.3 deg.C

4. The degree of superheat of the evaporator is 5.5 DEG C

5. The isentropic efficiency is 70 percent

6. The volumetric efficiency is 100%

7. The temperature rise of the suction pipeline is 2 DEG C

Table 6: performance of residential air-water heat pump circulation system

Table 6 shows the thermodynamic performance of the residential air-to-water heat pump cycle system compared to the R410A system.

Compositions 1 to 4 showed 95% or more capacity and efficiency of matching compared to R410A. This indicates that the system performance is similar to R410A.

And R410A phaseIn contrast, compositions 1 to 4 exhibited pressure ratios of 98% to 99%. This indicates that the compressor efficiency is similar to R410A and no modifications to the R410A compressor are required.

Compositions 1 through 4 showed exhaust temperature increases of approximately 10 ℃ compared to R410A. This indicates good compressor reliability and no risk of oil breakdown or motor burnout.

Compositions 1 to 4 showed evaporator glide of less than 2 ℃. This indicates that evaporator slippage does not affect system performance.

Example 5: medium temperature refrigerating system

Description of the invention：

Medium temperature refrigeration systems are used to cool food or beverages, such as in refrigerators and bottle coolers. The system typically has an air-refrigerant evaporator for cooling food or beverages, a reciprocating or rotary compressor, an air-refrigerant condenser for exchanging heat with ambient air, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is in the range of about-12 ℃ to about 0 ℃, and the condensation temperature is in the range of about 40 ℃ to about 70 ℃.

Operating conditions：

1. The condensation temperature is 45 ℃, and the corresponding outdoor environment temperature is 35 DEG C

2. Local cooling of condenser 5.5 deg.C

3. The evaporation temperature is-8 deg.C, and the corresponding box temperature is 1.7 deg.C

4. The degree of superheat of the evaporator is 5.5 DEG C

5. The isentropic efficiency is 65 percent

6. The volumetric efficiency is 100%

7. The temperature rise of the suction pipeline is 10 DEG C

Table 7: performance of medium temperature refrigeration system

Table 7 shows the thermodynamic performance of the medium temperature refrigeration system compared to the R410A system.

Compositions 1 to 4 showed 95% or more capacity and efficiency of matching compared to R410A. This indicates that the system performance is similar to R410A.

Compositions 1 to 4 exhibited pressure ratios of 98% to 99% compared to R410A. This indicates that the compressor efficiency is similar to R410A and no modifications to the R410A compressor are required.

Compositions 1 through 4 showed exhaust temperature increases of approximately 10 ℃ compared to R410A. This indicates good compressor reliability and no risk of oil breakdown or motor burnout.

Compositions 1 to 4 showed evaporator glide of less than 2 ℃. This indicates that evaporator slippage does not affect system performance.

Example 6: low-temperature refrigerating system

Description of the invention：

Cryogenic refrigeration systems are used to freeze food products in, for example, ice cream machines and freezers. The system typically has an air-refrigerant evaporator for cooling food or beverages, a reciprocating or rotary compressor, an air-refrigerant condenser for exchanging heat with ambient air, and a thermal or electronic expansion valve. The refrigerant evaporation temperature is in the range of about-40 ℃ to about-12 ℃, and the condensation temperature is in the range of about 40 ℃ to about 70 ℃.

Operating conditions：

1. The condensation temperature is 55 ℃, and the corresponding outdoor environment temperature is 35 DEG C

2. Local cooling of condenser to 5 deg.C

3. The evaporation temperature is-23 deg.C, and the corresponding box temperature is 1.7 deg.C

4. The degree of superheat of the evaporator is 5.5 DEG C

5. The isentropic efficiency is 60 percent

6. The volumetric efficiency is 100%

7. The temperature rise of the suction pipeline is 1 DEG C

Table 8: performance of cryogenic refrigeration system

Table 8 shows the thermodynamic performance of the cryogenic refrigeration system compared to the R410A system.

Compositions 1 to 4 showed 98% or more capacity and efficiency of matching compared to R410A. This indicates that the system performance is similar to R410A.

Compositions 1 to 4 showed pressure ratios of 97% to 98% compared to R410A. This indicates that the compressor efficiency is similar to R410A and no modifications to the R410A compressor are required.

Compositions 1 to 4 showed evaporator glide of less than 2 ℃. This indicates that evaporator slippage does not affect system performance.

Example 7: stabilizers for refrigerant/lubricant thermal stability examples

Description of the invention：

The use of additives such as stabilizers ensures that the composition of the refrigerant (and lubricant) is effectively maintained through normal operation of the heat transfer device to which it is added. The refrigerant and lubricant are typically tested in accordance with ASHRAE standard 97 "sealed glass tube method for testing chemical stability of materials used in refrigerant systems" to simulate accelerated aging. After the test, the content of the halide was used to judge the stability of the refrigerant, and the Total Acid Number (TAN) was used to judge the stability of the lubricant. Furthermore, the lubricant should be transparent and colorless, the metal should be shiny (unchanged), and no solids should be present.

The following experiments were conducted to show the effect of stabilizer addition on refrigerant/lubricant compositions.

Test conditions for sealed tube：

1.The sealed tube contains 50% of refrigerant and 50% of lubricant

2.The refrigerants are as shown in table 9 below

3.The lubricant is ISO 68 POE

4.Degassing refrigerants and lubricants

5.The refrigerant contains < 10ppm of moisture

6.The lubricant contains < 30ppm of moisture

7.Sealed tube containing coupons of steel, copper and aluminum

8.The sealed tube was placed in an oven at 175 ℃ for 14 days

TABLE 9 refrigerant composition

Table 10: summary of required Experimental results

The purpose of this experiment was to obtain the following results:

lubricant vision	Metal vision	Is a solid present?	Halide [ ppm ]]	TAN[mgKOH/g]
					Transparent and colorless	Glossy	Whether or not	＜300	＜3.0

Table 11: analysis of refrigerant and lubricant after gland test

Table 11 shows the results of the refrigerant and lubricant tests after a 14 day sealed tube test at 175 ℃.

Composition 1 shows that the thermal stability conditions are not met in the absence of a stabilizer.

Composition 2 shows that all test conditions are met with 1.5 wt% each of farnesene and diphenyl phosphite. This indicates that this combination of refrigerant, lubricant and stabilizer has similar thermal stability to other commercial refrigerants such as R410A.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims, or any claims, which are appended hereto.

The present application may include the following technical solutions.

1. A refrigerant comprising at least about 97% by weight of a blend of three compounds, the blend consisting of:

from about 38% to about 48% by weight difluoromethane (HFC-32),

from about 6% to about 12% by weight pentafluoroethane (HFC-125),

from about 33 to about 41 weight percent trifluoroiodomethane (CF)₃I) And an

From about 2 to about 16 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the three compounds in the blend.

2. The refrigerant of scheme 1, the blend consisting of:

from about 46 to about 48 weight percent difluoromethane (HFC-32),

from about 11% to about 12% by weight pentafluoroethane (HFC-125),

from about 34% to about 36% by weight of trifluoroiodomethane (CF)₃I) And an

About 5 to about 7 weight percent 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the three compounds in the blend.

3. The refrigerant of scheme 1 or scheme 2, the blend consisting of:

about 47 weight percent difluoromethane (HFC-32),

about 12% by weight pentafluoroethane (HFC-125),

about 35% by weight of trifluoroiodomethane (CF)₃I) And an

About 6% by weight of 2, 3, 3, 3-tetrafluoropropene (HFO-1234yf),

wherein the percentages are based on the total weight of the three compounds in the blend.

4. The refrigerant of any of embodiments 1-3, wherein the refrigerant comprises at least about 98.5 wt.% of the blend.

5. The refrigerant of any of embodiments 1-3, wherein the refrigerant comprises at least about 99.5 wt.% of the blend.

6. The refrigerant of any of schemes 1 through 3, wherein the refrigerant consists essentially of the blend.

7. The refrigerant according to any one of aspects 1 to 3, wherein the refrigerant consists of the blend.

8. The refrigerant according to any one of aspects 1 to 7, wherein the weight ratio of (HFC-32+ HFO-1234 yf): (CF3I + HFC-125) is from greater than about 1: 1 to less than 1.2: 1.

9. The refrigerant according to any one of aspects 1 to 7, wherein the weight ratio of (HFC-32+ HFO-1234 yf): (CF3I + HFC-125) is from greater than about 1.1: 1 to about 1.18: 1.

10. The refrigerant of any of embodiments 1 through 9, wherein the weight ratio of HFC-32 HFC-125 is from greater than 3.5: 1 to about 4: 1, preferably from about 3.8: 1 to about 3.9: 1.1.

11. A heat transfer composition comprising the refrigerant of any of embodiments 1-10.

12. The heat transfer composition of scheme 11 wherein the refrigerant comprises greater than 40% by weight of the heat transfer composition.

13. The heat transfer composition of either scheme 11 or scheme 12 further comprising a stabilizer selected from a diene-based compound, or a diene-based compound and a phosphorus compound, and/or a nitrogen compound and/or a phenol compound.

14. The heat transfer composition of claim 13, wherein the diene-based compound is a terpene selected from the group consisting of rutinene, retinal, erodial, terpinene, delta 3-carene, terpinolene, phellandrene, fenchylene, myrcene, farnesene, pinene, nerol, citral, camphor, menthol, limonene, nerolidol, phytol, carnosic acid, and vitamin a₁Preferably farnesene.

15. The heat transfer composition of either scheme 13 or scheme 14 wherein the diene-based compound is provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.01% to about 2% by weight, more preferably from about 0.1% to 1% by weight.

16. The heat transfer composition of scheme 13 wherein the stabilizer composition comprises a diene based on any of schemes 14 or 15 and a phosphorus compound, wherein the phosphorus compound is a phosphite compound selected from diaryl phosphites, dialkyl phosphites, triaryl phosphites and/or trialkyl phosphites, in particular from hindered phosphites, tris (di-tert-butylphenyl) phosphite, di-n-octyl phosphite, isodecyl diphenyl phosphite and diphenyl phosphite, in particular diphenyl phosphites, and/or phosphate compounds selected from triaryl phosphates, trialkyl phosphates, alkyl mono-acid phosphates, aryl di-acid phosphates, amine phosphates, preferably triaryl phosphates and/or trialkyl phosphates, in particular tri-n-butyl phosphate.

17. The heat transfer composition of scheme 16 wherein the phosphorus compound is a phosphite compound selected from the group consisting of hindered phosphites, tris (di-t-butylphenyl) phosphite, di-n-octyl phosphite, isodecyl diphenyl phosphite, and diphenyl phosphite.

18. The heat transfer composition of any of claims 13-17 wherein the phosphorus compound is present in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.001% to about 2% by weight, more preferably from about 0.1% to 1% by weight.

19. The heat transfer composition of any of schemes 13 through 18 wherein the stabilizer composition comprises farnesene and diphenyl phosphite.

20. The heat transfer composition of any of schemes 13 through 19 wherein the nitrogen compound is one or more compounds selected from the group consisting of dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene, and TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy ], preferably dinitrobenzene.

21. The heat transfer composition of any of schemes 13 through 19 wherein the nitrogen compound is one or more compounds selected from the group consisting of: dinitrobenzene, nitrobenzene, nitromethane, nitrosobenzene and TEMPO [ (2, 2, 6, 6-tetramethylpiperidin-1-yl) oxy group ](ii) a A secondary or tertiary amine selected from diphenylamine, p-phenylenediamine, triethylamine, tributylamine, diisopropylamine, triisobutylamine; amine antioxidants such as substituted piperidine compounds, i.e. derivatives of alkyl substituted piperidine, piperidinyl, piperazinone or alkoxypiperidinyl selected from 2, 2, 6, 6-tetramethyl-4-piperidone, 2, 6, 6-tetramethyl-4-piperidinol; bis- (1, 2, 2, 6, 6-pentamethylpiperidine) sebacate; bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, poly (N-hydroxyethyl-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidyl succinate), alkylated p-phenylenediamines, such as N-phenyl-N '- (1, 3-dimethyl-butyl) -p-phenylenediamine or N, N' -di-sec-butyl-p-phenylenediamineDiamines and hydroxylamines, such as tallow amine, methylbistallow amine and bistallow amine, or phenol-alpha-naphthylamine or765 (Ciba),1944(Mayzo Co.) and1770(Mayzo Co.); alkyl diphenylamines such as bis (nonylphenylamine), dialkylamines such as (N- (1-methylethyl) -2-propylamine, or phenyl-alpha-naphthylamine (PANA), alkyl-phenyl-alpha-naphthylamine (APANA) and bis (nonylphenyl) amine, preferably phenyl-alpha-naphthylamine (PANA).

22. The heat transfer composition of any of schemes 13 through 21 wherein the nitrogen compound is provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.01% to about 2% by weight, more preferably from about 0.1% to 1% by weight.

23. The heat transfer composition of any of schemes 13 through 22, wherein the phenolic compound is one or more compounds selected from the group consisting of: 4, 4' -methylenebis (2, 6-di-tert-butylphenol); 4, 4' -bis (2, 6-di-tert-butylphenol); 2, 2-biphenyldiol or 4, 4-biphenyldiol, including 4, 4' -bis (2-methyl-6-tert-butylphenol); derivatives of 2, 2-biphenyldiol or 4, 4-biphenyldiol; 2, 2' -methylenebis (4-ethyl-6-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-tert-butylphenol); 4, 4-butylidenebis (3-methyl-6-tert-butylphenol); 4, 4-isopropylidenebis (2, 6-di-tert-butylphenol); 2, 2' -methylenebis (4-methyl-6-nonylphenol); 2, 2' -isobutylidene bis (4, 6-dimethylphenol); 2, 2' -methylenebis (4-methyl-6-cyclohexylphenol); 2, 6-di-tert-butyl-4-methylphenol (BHT); 2, 6-di-tert-butyl-4-ethylphenol: 2, 4-dimethyl-6-tert-butylphenol; 2, 6-di-tert- α -dimethylamino-p-cresol; 2, 6-di-tert-butyl-4 (N, N' -dimethylaminomethylphenol); 4, 4' -thiobis (2-methyl-6-tert-butylphenol); 4, 4' -thiobis (3-methyl-6-tert-butylphenol); 2, 2' -thiobis (4-methyl-6-tert-butylphenol); bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide; bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, tocopherol, hydroquinone, 2 ', 6 ' -tetra-tert-butyl-4, 4 ' -methylenediphenol and tert-butylhydroquinone, preferably BHT.

24. A heat transfer composition comprising the refrigerant of any of embodiments 1 through 10 and a stabilizer composition, wherein the stabilizer composition comprises BHT in an amount from about 0.001% to about 5% by weight of the heat transfer composition.

25. A heat transfer composition comprising a refrigerant according to any of embodiments 1 to 10 and a stabilizer composition, wherein the stabilizer composition consists of BHT in an amount from about 0.001 to about 5 weight percent.

26. The heat transfer composition of any of schemes 13 through 25 wherein the phenol compound is provided in the heat transfer composition in an amount of from about 0.001% to about 5% by weight, preferably from about 0.01% to about 2% by weight, more preferably from about 0.1% to 1% by weight.

27. A heat transfer composition comprising the refrigerant and stabilizer composition of any one of embodiments 1 through 10, wherein the stabilizer composition comprises farnesene, diphenyl phosphite and BHT.

28. A heat transfer composition comprising the refrigerant and stabilizer composition of any one of embodiments 1 through 10, wherein the stabilizer composition consists of farnesene, diphenyl phosphite and BHT.

29. The heat transfer composition of any of schemes 11 through 28 further comprising a lubricant selected from the group consisting of polyol esters (POE), polyalkylene glycols (PAG), PAG oils, silicone oils, mineral oils, Alkylbenzenes (AB), polyvinyl ethers (PVE), and poly (alpha-olefins) (PAO).

30. The heat transfer composition of scheme 29 wherein said lubricant is selected from the group consisting of polyol esters (POE), polyalkylene glycols (PAG), mineral oil, Alkyl Benzenes (AB) and polyvinyl ethers (PVE).

31. The heat transfer composition of claim 29 wherein said lubricant is selected from the group consisting of polyol esters (POE), mineral oil, Alkylbenzenes (AB), and polyvinyl ethers (PVE).

32. The heat transfer composition of embodiment 29 wherein said lubricant is selected from the group consisting of polyol esters (POE), mineral oil, and Alkylbenzenes (AB).

33. The heat transfer composition of claim 29 wherein said lubricant is a polyol ester (POE).

34. The heat transfer composition of any of embodiments 29-33 wherein the lubricant is present in the heat transfer composition in an amount of from about 10 to about 60 weight percent, preferably in an amount of from about 30 to about 50 weight percent, based on the weight of the heat transfer composition.

35. The heat transfer composition of scheme 11, wherein the heat transfer composition consists essentially of the refrigerant of any of schemes 1-10.

36. The heat transfer composition of any of schemes 11 to 35, wherein the heat transfer composition consists essentially of the refrigerant of any of schemes 1 to 10 and the stabilizer composition of any of schemes 13 to 28.

37. The heat transfer composition of any of schemes 11 to 35, wherein the heat transfer composition consists essentially of the refrigerant of any of schemes 1 to 10, the stabilizer composition of any of schemes 13 to 28, and the lubricant of any of schemes 29 to 34.

38. The heat transfer composition of any of schemes 11 through 37 having a Global Warming Potential (GWP) of not greater than 750.

39. The heat transfer composition of any of claims 11-38 having an Ozone Depletion Potential (ODP) of no greater than 0.05, preferably 0.02, more preferably about zero.

40. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase at least one temperature in the range of-40 ℃ to 80 ℃.

41. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 20 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase at least one temperature in the range of-40 ℃ to 80 ℃.

42. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 50 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase at least one temperature in the range of-40 ℃ to 80 ℃.

43. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase throughout the temperature range of-40 ℃ to 80 ℃.

44. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 20 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase throughout the temperature range of-40 ℃ to 80 ℃.

45. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 50 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase throughout the temperature range of-40 ℃ to 80 ℃.

46. The heat transfer composition of any of schemes 11 through 34 and 37 through 39, wherein the POE lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase at least one temperature in the range of-40 ℃ to-25 ℃ and/or +40 ℃ to 80 ℃.

47. The heat transfer composition of any of schemes 11 through 34 and 37 through 39, wherein the POE lubricant is present in an amount of 20 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase at least one temperature in the range of-40 ℃ to-25 ℃ and/or +40 ℃ to 80 ℃.

48. The heat transfer composition of any of schemes 11 through 34 and 37 through 39, wherein the POE lubricant is present in an amount of 50 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase at least one temperature in the range of-40 ℃ to-25 ℃ and/or +40 ℃ to 80 ℃.

49. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 5 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase throughout the temperature range of-40 ℃ to-25 ℃ and/or +40 ℃ to 80 ℃.

50. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 20 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase throughout the temperature range of-40 ℃ to-25 ℃ and/or +40 ℃ to 80 ℃.

51. The heat transfer composition of any of schemes 11-34 and 37-39, wherein the POE lubricant is present in an amount of 50 wt.% relative to the total amount of refrigerant and lubricant, and the mixture has one liquid phase throughout the temperature range of-40 ℃ to-25 ℃ and/or +40 ℃ to 80 ℃.

52. A method of cooling in a heat transfer system including an evaporator, a condenser, and a compressor, the method comprising the steps of: i) condensing the heat transfer composition of any of claims 11 to 51, and ii) evaporating said composition in the vicinity of a body or article to be cooled; wherein the evaporator temperature of the heat transfer system is in the range of about-40 ℃ to about-10 ℃.

53. A method of heating in a heat transfer system including an evaporator, a condenser, and a compressor, the method comprising the steps of: i) condensing the heat transfer composition of any of aspects 11-51 in the vicinity of a body or article to be heated, and ii) evaporating the composition; wherein the evaporator temperature of the heat transfer system is in the range of about-30 ℃ to about 5 ℃.

54. The method of scheme 52 or scheme 53, wherein the heat transfer system is an air conditioning system.

55. The method of claim 54, wherein the air conditioning system is a mobile air conditioning system, particularly a car air conditioning system; mobile heat pumps, in particular electric vehicle heat pumps; a chiller, particularly a positive displacement chiller, more particularly an air-cooled or water-cooled direct expansion chiller; residential air conditioning systems, particularly ducted or ductless split air conditioning systems; a residential heat pump; residential air-water heat pump/circulation systems; an industrial air conditioning system; commercial air conditioning systems, particularly packaged rooftop units or Variable Refrigerant Flow (VRF) systems; and commercial air, water or ground source heat pump systems.

56. The method according to scheme 54, wherein the air conditioning system is a residential air conditioning system (evaporator temperature in the range of about 0 ℃ to about 10 ℃, particularly about 7 ℃ for cooling, and/or in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃ for heating), particularly a residential air conditioning system with a reciprocating, rotary (rolling piston or rotary valve), or scroll compressor.

57. The method of aspect 54, wherein the air conditioning system is an air-cooled chiller (evaporator temperature in the range of about 0 ℃ to about 10 ℃, particularly about 4.5 ℃), particularly an air-cooled chiller having a positive displacement compressor, more particularly an air-cooled chiller having a reciprocating or scroll compressor.

58. The method of scheme 54, wherein the air conditioning system is a residential air-to-water heat pump cycle system (evaporator temperature in the range of about-20 ℃ to about 3 ℃, particularly about 0.5 ℃).

59. The method of scheme 54, wherein the air conditioning system is a residential air-to-water heat pump cycle system (evaporator temperature in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃).

60. The method of scheme 54, wherein the air conditioning system is a medium temperature refrigeration system (evaporator temperature in the range of about-12 ℃ to about 0 ℃, particularly about-8 ℃).

61. The method of scheme 54, wherein the air conditioning system is a cryogenic refrigeration system (evaporator temperature in the range of about-40 ℃ to about-12 ℃, particularly about-23 ℃ or preferably about-32 ℃).

62. The method of scheme 54, wherein the air conditioning system is a residential air conditioning system (evaporator temperature in the range of about 0 ℃ to 10 ℃).

63. The method of scheme 54, wherein the air conditioning system is a residential heat pump system (evaporator temperature in the range of about-20 ℃ to about 3 ℃, or about-30 ℃ to about 5 ℃).

64. The method of scheme 54, wherein the air conditioning system is a commercial air conditioning system (evaporator temperature in the range of about 0 ℃ to about 10 ℃).

65. A method of replacing an existing refrigerant contained in a heat transfer system, the method comprising removing at least a portion of the existing refrigerant from the system, the existing refrigerant being R-410A, and replacing at least a portion of the existing refrigerant by introducing the refrigerant according to any of schemes 1 to 8 or the heat transfer composition according to any of schemes 11 to 51 into the system.

66. The method of aspect 65, wherein the heat transfer system is an air conditioning system selected from a mobile air conditioning system, particularly an automotive air conditioning system; mobile heat pumps, in particular electric vehicle heat pumps; a chiller, particularly a positive displacement chiller, more particularly an air-cooled or water-cooled direct expansion chiller; residential air conditioning systems, particularly ducted or ductless split air conditioning systems; a residential heat pump; residential air-water heat pump/circulation systems; an industrial air conditioning system; commercial air conditioning systems, particularly packaged rooftop units or Variable Refrigerant Flow (VRF) systems; and commercial air, water or ground source heat pump systems.

67. A heat transfer system comprising a compressor, a condenser and an evaporator in fluid communication and a heat transfer composition according to any of schemes 11 to 51 in the system, the condenser having an operating temperature of from about +20 ℃ to about +70 ℃ and the evaporator having an operating temperature of from about-40 ℃ to about +10 ℃.

68. The heat transfer system of claim 67, wherein the heat transfer system is an air conditioning system, a mobile air conditioning system, particularly an automotive air conditioning system; mobile heat pumps, in particular electric vehicle heat pumps; a chiller, particularly a positive displacement chiller, more particularly an air-cooled or water-cooled direct expansion chiller; residential air conditioning systems, particularly ducted or ductless split air conditioning systems; a residential heat pump; residential air-water heat pump/circulation systems; an industrial air conditioning system; and commercial air conditioning systems, particularly packaged rooftop units or Variable Refrigerant Flow (VRF) systems; and commercial air, water or ground source heat pump systems.

69. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a residential air conditioning system (evaporator temperature in the range of about 0 ℃ to about 10 ℃, particularly about 7 ℃ for cooling, and/or in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃ for heating).

70. The heat transfer system of version 67 or version 68, wherein the heat transfer system is an air-cooled chiller (evaporator temperature in the range of about 0 ℃ to about 10 ℃, particularly about 4.5 ℃), particularly an air-cooled chiller with a positive displacement compressor, more particularly an air-cooled chiller with a reciprocating or scroll compressor.

71. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a residential air-to-water heat pump cycle system (evaporator temperature in the range of about-20 ℃ to about 3 ℃, particularly about 0.5 ℃).

72. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a residential air-to-water heat pump cycle system (evaporator temperature in the range of about-30 ℃ to about 5 ℃, particularly about 0.5 ℃).

73. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a medium temperature refrigeration system (evaporator temperature in the range of about-12 ℃ to about 0 ℃, particularly about-8 ℃).

74. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a cryogenic refrigeration system (evaporator temperature in the range of about-40 ℃ to about-12 ℃, particularly about-23 ℃ or preferably about-32 ℃).

75. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a residential air conditioning system (evaporator temperature in the range of about 0 ℃ to 10 ℃).

76. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a residential heat pump system (evaporator temperature in the range of about-20 ℃ to about 3 ℃, or about-30 ℃ to about 5 ℃).

77. The heat transfer system of scheme 67 or scheme 68, wherein the heat transfer system is a commercial air conditioning system (evaporator temperature in the range of about 0 ℃ to about 10 ℃).

78. Use of the heat transfer composition of any of embodiments 11 to 51 in a cooler.

79. Use of the heat transfer composition of any of schemes 11 to 51 in a positive displacement cooler.

80. Use of the heat transfer composition of any of aspects 11-51 in an air-cooled chiller.

81. Use of the heat transfer composition according to any of aspects 11 to 51 in a water-cooled direct expansion cooler.

82. Use of the heat transfer composition of any of claims 11 to 51 in a stationary air conditioner.

83. Use of the heat transfer composition of any of embodiments 11-51 in a residential air conditioner.

84. Use of the heat transfer composition of any of aspects 11 to 51 in an industrial air conditioner.

85. Use of the heat transfer composition of any of embodiments 11-51 in a commercial air conditioner.

86. Use of the heat transfer composition of any of embodiments 11-51 in commercial refrigeration.

87. Use of the heat transfer composition of any of embodiments 11-51 in a commercial refrigerator.

88. Use of the heat transfer composition of any of embodiments 11-51 in a commercial freezer.

89. Use of the heat transfer composition of any of claims 11-51 in a vending machine.

90. The refrigerant according to any one of aspects 1 to 10, wherein the refrigerant

(a) Has an efficiency (COP) of about 95% to about 105% of the efficiency of R410A in the system and/or used in the process; and is

(b) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013.

97. The refrigerant of scheme 90, wherein the refrigerant

(a) Has an efficiency (COP) of about 95% to about 105% of the efficiency of R410A in the system and/or used in the process;

(b) Has a capacity of about 95% to about 105% of the capacity of R410A in the system and/or used in the method; and is

(c) Are non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013.

92. The refrigerant according to any one of schemes 90 or 91, wherein the refrigerant

(a) Has an efficiency (COP) of about 95% to about 105% of the efficiency of R410A in the system and/or used in the process;

(b) has a capacity of about 95% to about 105% of the capacity of R410A in the system and/or used in the method; and is

(c) Is non-flammable as determined according to ASTM E681-2009 test procedure as claimed in ASHRAE standard 34-2013 and as described in annex B1 of ASHRAE standard 34-2013;

(d) producing a compressor discharge temperature in the system and/or the method that is no greater than 10 ℃ greater than a compressor discharge temperature of R-410A; and is

(e) The compressor pressure ratio generated in the system and/or the method is about 95% to about 105% of the compressor pressure ratio of R-410A.