阅读说明：本技术 高阻燃低温发泡型门窗穿条发泡料、聚氨酯泡沫及其制备方法 (High-flame-retardance low-temperature foaming type door and window strip penetrating foaming material, polyurethane foam and preparation method of polyurethane foam ) 是由 董建国 魏路 李学庆 周剑平 于 2021-05-25 设计创作，主要内容包括：本申请涉及一种高阻燃低温发泡型门窗穿条发泡料,其包含组合聚醚多元醇和异氰酸酯,其特征在于,以重量份数为基准计,所述组合聚醚多元醇包含下述重量份数的组分：聚酯多元醇80-100份、聚醚多元醇10-20份、催化剂4～6份、泡沫稳定剂2～3份、阻燃剂30-40份、物理发泡剂20～25份以及化学发泡剂0.5-1份。本申请还提供一种高阻燃低温发泡型门窗穿条用聚氨酯泡沫及其制备方法。本文所述的发泡料可在0℃下正常发泡,且阻燃性能可以达到B1阻燃等级。(The application relates to a high-flame-retardance low-temperature foaming type door and window penetrating strip foaming material which comprises combined polyether polyol and isocyanate, and is characterized in that the combined polyether polyol comprises the following components in parts by weight: 80-100 parts of polyester polyol, 10-20 parts of polyether polyol, 4-6 parts of catalyst, 2-3 parts of foam stabilizer, 30-40 parts of flame retardant, 20-25 parts of physical foaming agent and 0.5-1 part of chemical foaming agent. The application also provides a polyurethane foam for the high-flame-retardance low-temperature foaming type door and window penetrating strip and a preparation method thereof. The foaming material can be normally foamed at 0 ℃, and the flame retardant property can reach the flame retardant grade of B1.)

1. The high-flame-retardance low-temperature foaming type door and window penetrating strip foaming material comprises combined polyether polyol and isocyanate, and is characterized in that the combined polyether polyol comprises the following components in parts by weight: 80-100 parts of polyester polyol, 10-20 parts of polyether polyol, 4-6 parts of catalyst, 2-3 parts of foam stabilizer, 30-40 parts of flame retardant, 20-25 parts of physical foaming agent and 0.5-1 part of chemical foaming agent;

wherein the polyester polyol is at least one of AK7004, PS3158 and PS 2412;

wherein the polyether polyol is one or more of polyether polyol 403, Donol R6049, Donol C305 and Donol R4040.

2. The high flame retardant low temperature foaming material for door and window strips as claimed in claim 1, wherein the catalyst is one or more of POLYACAT 303, POLYACAT 8, Dabco BX405, K15, POLYCAT 41 and DABCO T;

the foam stabilizer is one or a combination of two of B8545 and B84813;

the flame retardant is one or more of tris (2-chloropropyl) phosphate, triethyl phosphate and tris (2-chloroethyl) phosphate.

3. The high flame retardant low temperature foam-type door and window stripping foam of claim 1, wherein the physical blowing agent is HFC-245 fa;

the chemical blowing agent is water, preferably deionized water.

4. The high flame retardant low temperature foaming door and window trim foaming material according to any one of claims 1 to 3, wherein the isocyanate is polyphenyl polymethylene polyisocyanate.

5. The high flame retardant low temperature foaming door and window stripping foam according to any one of claims 1 to 3, wherein the mass ratio of the combined polyether polyol to the isocyanate is 1: 1.

6. The high flame retardant low temperature foaming material for door and window strips according to claim 1, wherein the combined polyether polyol comprises the following components in parts by weight: polyester polyol AK 700480 parts, polyether polyol Donol C3055 parts, Donol R60495 parts, Donol R404010 parts, catalyst POLYACAT 3031 parts, Dabco BX 4052 parts, K152 parts, DABCO T0.5 parts, silicone oil B85452 parts, deionized water 0.9 parts, TCPP 20 parts, TEP 20 parts and foaming agent HFC-245fa 25 parts.

7. The high flame retardant low temperature foaming material for door and window strips according to claim 1, wherein the combined polyether polyol comprises the following components in parts by weight: polyester polyol PS 315880 parts, polyether polyol Donol C30510 parts, Donol R404010 part, catalyst POLYACAT 3030.5 parts, POLYACAT 81.5 parts, POLYCAT 413 parts, DABCO T1 part, silicone oil B85453 parts, deionized water 0.8 part, TCEP 40 part and foaming agent HFC-245fa 23 part.

8. A polyurethane foam for a high flame-retardant low-temperature foaming door and window molding, which is prepared by foaming the high flame-retardant low-temperature foaming door and window molding foam according to any one of claims 1 to 7.

9. A method for preparing the polyurethane foam for the high flame retardant low temperature foaming door and window weather strip according to claim 8, wherein the method comprises: and mixing the combined polyether polyol with the isocyanate by using a low-pressure foaming machine, and pouring the mixture into a paper strip foaming groove penetrating into a cavity of the door and window profile to obtain the high-flame-retardant low-temperature foaming type polyurethane foam for the door and window penetrating strip, which is used for filling the door and window profile.

10. The process of claim 9 wherein the combined polyether polyol is mixed with the isocyanate at a low pressure foaming machine feed rate of 30 g/s;

and the mixing temperature of the low-pressure foaming machine is 0 ℃ to room temperature when the combined polyether polyol and the isocyanate are mixed.

Technical Field

The present application relates to the field of polyurethane technology. Specifically, the application relates to a high-flame-retardance low-temperature foaming type broken bridge aluminum door and window penetrating strip foaming material, polyurethane foam and a preparation method thereof.

Background

In modern buildings, doors and windows are one of the most common parts, wherein aluminum alloy doors and windows are the mainstream of consumers due to the advantages of convenient production and installation, no deformation after long-term use and the like. However, aluminum alloy has a better heat conduction effect than wood and the like, which leads to the increase of energy consumption, and as the national requirements on energy saving and consumption reduction are higher and higher, the energy saving of doors and windows draws attention of numerous scholars. In order to solve the energy-saving and heat-insulating problem of doors and windows, materials such as rock wool, polystyrene, polyurethane rigid foam and the like can be filled in the section bars of the doors and windows. As is well known, polyurethane is the best material for thermal insulation among the currently known organic materials, and thus is the first choice for filling windows and doors. The aluminum alloy building heat-insulating section bar in China mainly comprises a bar penetrating type section bar and a pouring type section bar, the market share of the bar penetrating type section bar is large, a cavity is formed in the middle of the section bar, and the heat-insulating property of the section bar can be greatly improved by filling a polyurethane hard foam material. Because the polyurethane rigid foam needs a certain environmental temperature in the production process and has requirements on the temperature of the door and window profiles, but all manufacturers produce the polyurethane rigid foam at the environmental temperature in the actual production process, so that the process requirements are difficult to guarantee. When the environmental temperature is about 0 ℃, the shrinkage problem of the polyurethane rigid foam material is particularly prominent, and the heat insulation performance of doors and windows is seriously damaged.

While the heat insulation performance is concerned, the fire resistance of the heat insulation material is also concerned gradually. When the temperature of a fire disaster is higher than 600 ℃, the aluminum profile begins to melt, the heat-insulating filling material in the cavity of the profile burns out, and toxic smoke is released, so that the life safety of people is seriously harmed. Therefore, the fireproof and flame-retardant performance of the filling and heat-insulating material is improved, and the significance of ensuring the low-temperature foaming and heat-insulating performance is great.

Disclosure of Invention

The application aims to provide a high-flame-retardance low-temperature foaming type broken bridge aluminum door and window penetrating strip foaming material, so that the technical problem in the prior art is solved.

The invention also aims to provide the polyurethane foam for the high-flame-retardant low-temperature foaming type door and window lacing tape, which is prepared from the foaming material.

The application also aims to provide a preparation method of the polyurethane foam for the high-flame-retardant low-temperature foaming type door and window penetrating strip.

In order to solve the above technical problems, the present application provides the following technical solutions.

In a first aspect, the application provides a high flame-retardant low-temperature foaming type door and window wear strip foaming material, which comprises a combined polyether polyol and isocyanate, and is characterized in that the combined polyether polyol comprises the following components in parts by weight: 80-100 parts of polyester polyol, 10-20 parts of polyether polyol, 4-6 parts of catalyst, 2-3 parts of foam stabilizer, 30-40 parts of flame retardant, 20-25 parts of physical foaming agent and 0.5-1 part of chemical foaming agent;

wherein the polyester polyol is at least one of AK7004, PS3158 and PS 2412;

wherein the polyether polyol is one or more of polyether polyol 403, Donol R6049, Donol C305 and Donol R4040.

In one embodiment of the first aspect, the catalyst is one or more of POLYACAT 303, POLYACAT 8, Dabco BX405, K15, POLYCAT 41, and DABCO T;

the foam stabilizer is one or a combination of two of B8545 and B84813;

the flame retardant is one or more of tris (2-chloropropyl) phosphate, triethyl phosphate and tris (2-chloroethyl) phosphate.

In one embodiment of the first aspect, the physical blowing agent is HFC-245 fa;

the chemical blowing agent is water, preferably deionized water.

In one embodiment of the first aspect, the isocyanate is a polyphenyl polymethylene polyisocyanate.

In one embodiment of the first aspect, the combined polyether polyol and the isocyanate are present in a mass ratio of 1: 1.

In one embodiment of the first aspect, the combined polyether polyol comprises the following components in parts by weight: polyester polyol AK 700480 parts, polyether polyol Donol C3055 parts, Donol R60495 parts, Donol R404010 parts, catalyst POLYACAT 3031 parts, Dabco BX 4052 parts, K152 parts, DABCO T0.5 parts, silicone oil B85452 parts, deionized water 0.9 parts, TCPP 20 parts, TEP 20 parts and foaming agent HFC-245fa 25 parts.

In one embodiment of the first aspect, the combined polyether polyol comprises the following components in parts by weight: polyester polyol PS 315880 parts, polyether polyol Donol C30510 parts, Donol R404010 part, catalyst POLYACAT 3030.5 parts, POLYACAT 81.5 parts, POLYCAT 413 parts, DABCO T1 part, silicone oil B85453 parts, deionized water 0.8 part, TCEP 40 part and foaming agent HFC-245fa 23 part.

In a second aspect, the present application provides a polyurethane foam for a high flame-retardant low-temperature foaming door and window molding, which is prepared by foaming the high-flame-retardant low-temperature foaming door and window molding foam according to the first aspect.

In a third aspect, the present application provides a method for preparing the polyurethane foam for a high flame retardant low temperature foaming door and window weather strip according to the second aspect, wherein the method comprises: and mixing the combined polyether polyol with the isocyanate by using a low-pressure foaming machine, and pouring the mixture into a paper strip foaming groove penetrating into a cavity of the door and window profile to obtain the high-flame-retardant low-temperature foaming type polyurethane foam for the door and window penetrating strip, which is used for filling the door and window profile.

In one embodiment of the third aspect, the combined polyether polyol is mixed with the isocyanate at a low pressure foaming machine feed rate of 30 g/s.

In one embodiment of the third aspect, the mixing temperature of the low pressure foaming machine when the combined polyether polyol is mixed with the isocyanate is from 0 degrees celsius to room temperature.

Compared with the prior art, the invention has the advantages that: by adjusting the use amounts of the flame-retardant polyester polyol and the flame retardant and matching with the use of the low-conductivity polyether polyol, the B1 flame-retardant fireproof foam can be obtained after the combined polyether polyol disclosed by the invention is foamed with isocyanate. In addition, in combination with an effective catalyst, the foaming material disclosed herein has the characteristic of no shrinkage during low-temperature foaming, especially foaming at about 0 ℃, so that the heat insulation performance of the door and window profile product is ensured.

Detailed Description

Unless otherwise indicated, implied from the context, or customary in the art, all parts and percentages herein are by weight and the testing and characterization methods used are synchronized with the filing date of the present application. Where applicable, the contents of any patent, patent application, or publication referred to in this application are incorporated herein by reference in their entirety and their equivalent family patents are also incorporated by reference, especially as they disclose definitions relating to synthetic techniques, products and process designs, polymers, comonomers, initiators or catalysts, and the like, in the art. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definitions provided herein, the definition of the term provided herein controls.

The numerical ranges in this application are approximations, and thus may include values outside of the ranges unless otherwise specified. A numerical range includes all numbers from the lower value to the upper value, in increments of 1 unit, provided that there is a separation of at least 2 units between any lower value and any higher value. For example, if a compositional, physical, or other property (e.g., molecular weight, melt index, etc.) is recited as 100 to 1000, it is intended that all individual values, e.g., 100, 101,102, etc., and all subranges, e.g., 100 to 166,155 to 170,198 to 200, etc., are explicitly recited. For ranges containing a numerical value less than 1 or containing a fraction greater than 1 (e.g., 1.1, 1.5, etc.), then 1 unit is considered appropriate to be 0.0001, 0.001, 0.01, or 0.1. For ranges containing single digit numbers less than 10 (e.g., 1 to 5), 1 unit is typically considered 0.1. These are merely specific examples of what is intended to be expressed and all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be expressly stated in this application. It should also be noted that the terms "first," "second," and the like herein do not define a sequential order, but merely distinguish between different structures.

When used with respect to chemical compounds, the singular includes all isomeric forms and vice versa (e.g., "hexane" includes all isomers of hexane, individually or collectively) unless expressly specified otherwise. In addition, unless explicitly stated otherwise, the use of the terms "a", "an" or "the" are intended to include the plural forms thereof.

The terms "comprising," "including," "having," and derivatives thereof do not exclude the presence of any other component, step or procedure, and are not intended to exclude the presence of other elements, steps or procedures not expressly disclosed herein. To the extent that any doubt is eliminated, all compositions herein containing, including, or having the term "comprise" may contain any additional additive, adjuvant, or compound, unless expressly stated otherwise. Rather, the term "consisting essentially of … …" excludes any other components, steps or processes from the scope of any of the terms hereinafter recited, except those necessary for performance. The term "consisting of … …" does not include any components, steps or processes not specifically described or listed. Unless explicitly stated otherwise, the term "or" refers to the listed individual members or any combination thereof.

In a first aspect, the present application provides a foam comprising a combination polyether polyol and an isocyanate, the combination polyether polyol comprising the following components in parts by weight: 80-100 parts of polyester polyol, 10-20 parts of polyether polyol, 4-6 parts of catalyst, 2-3 parts of foam stabilizer, 30-40 parts of flame retardant, 20-25 parts of foaming agent and 0.5-1 part of water.

Polyester polyols

The polyester polyol generally refers to a polyester polyol obtained by polycondensation of a dicarboxylic acid with a diol or the like. Polyester polyols can be classified into aliphatic polyester polyols and aromatic polyester polyols according to whether they include aromatic structures.

In the present application, the polyester polyol is preferably at least one of AK7004, PS3158, PS2412, wherein AK7004 is available from estin (ningbo) chemical company limited.

Polyether polyols

Polyether polyols are oligomers which contain ether linkages (-R-O-R-) in the main chain and more than 2 hydroxyl groups (-OH) in the terminal or pendant groups. The polyether polyol is prepared by ring opening polymerization of low molecular weight polyol, polyamine or compound containing active hydrogen as initiator and olefin oxide under the action of catalyst. The alkylene oxides are mainly propylene oxide (propylene oxide) and ethylene oxide (ethylene oxide), of which propylene oxide is the most important. The polyhydric alcohol initiator includes dihydric alcohol such as propylene glycol and ethylene glycol, trihydric alcohol such as glycerin trimethylolpropane, and polyhydric alcohol such as pentaerythritol, tetrol, xylitol, sorbitol, and sucrose; the amine initiator is diethylamine, diethylenetriamine, etc.

In the present application, the polyether polyol is preferably one or more of polyether polyol 403, Donol R6049, Donol C305 and Donol R4040. Among them, Donol R6049, Donol C305 and Donol R4040 are preferably available from Shanghai Dongda Chemicals Co.

In the present invention, the catalyst may be a catalyst conventionally used in the art, preferably, POLYACAT 303, POLYACAT 8, Dabco BX405, K15, POLYCAT 41, Dabco T (all available from gas chemical (china) investment limited).

In the present invention, the flame retardant is a flame retardant conventionally used in the art, preferably TCPP, TEP, TCEP (all available from Yake science and technology Co., Ltd., Jiangsu)

In the present invention, the foam stabilizer may be a foam stabilizer conventionally used in the art. Preferably one or a combination of B8545 and B84813 (purchased from Woundplast (China) Co., Ltd.).

In the present invention, the blowing agent is HFC-245fa, a blowing agent conventionally used in the art.

In the present invention, the water is preferably deionized water.

The composite polyether can be prepared according to the conventional method in the field, and the components are generally stirred at normal temperature according to the parts by weight and are uniformly mixed.

In the present invention, the isocyanate may be an isocyanate conventionally used in the art, preferably a polyphenyl polymethylene polyisocyanate (abbreviated as PAPI) available from bayer corporation, germany.

In the invention, the mass ratio of the combined polyether polyol to the isocyanate is 1: 1.

In a second aspect, the invention also provides a preparation method of the polyurethane foam for the high flame-retardant low-temperature foaming type door and window penetrating strip, which comprises the following steps: and mixing the combined polyether with a low-pressure foaming agent and PAPI according to the flow of 30g/s, and pouring the mixed polyether into a paper strip foaming groove penetrating into a cavity of the door and window profile to obtain the door and window profile filled with the polyurethane rigid foam.

In the invention, the mixing method and conditions of the combined polyether are conventional methods and conditions in the field, the mixing temperature of the low-pressure foaming machine is ambient temperature, particularly about 0 ℃, and the method and conditions are rare in the field.

The mixing is preferably carried out using a low-pressure blowing agent at a flow rate of 30 g/s.

In the present invention, the foaming method and conditions are conventional in the art, and generally, the foaming is performed at room temperature, and particularly, at about 0 ℃.

In a third aspect, the present application provides a polyurethane foam for a high flame retardant low temperature intumescent door and window molding prepared by the method as described above, which is prepared by foaming the foam described herein.

The above preferred conditions can be arbitrarily combined to obtain preferred embodiments of the present invention without departing from the common general knowledge in the art.

The reagents and starting materials used in the present invention are commercially available.

The percentage in the invention is the mass percentage of each component in the total amount of the raw materials.

Examples

The technical solutions of the present application will be clearly and completely described below with reference to the embodiments of the present application. The reagents and raw materials used are commercially available unless otherwise specified. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.

The sources of the raw materials used in the following examples are as follows:

the Donol R6049 belongs to high-functionality hard-foam polyether polyol and has the characteristics of low thermal conductivity, good cohesiveness and the like. It is produced by Shanghai Dongda chemical Co., Ltd, and has the following performance parameters:

performance of	Parameter(s)
		Appearance of the product	Light yellow transparent liquid
Water content (%)	≤0.20
		Hydroxyl value (mgKOH/g)	480-520
Acid value (mgKOH/g)	≤0.15
		pH (Isolactol)	5.0-8.0
Potassium ion (ppm)	≤50
		Viscosity (25 ℃ C.) mPa.s	35000-45000
Chroma (GD)	≤6

。

Donol C305 is a long chain, low functionality polyether. The functionality is 3 and the average molecular weight is about 500. It is produced by Shanghai Dongda chemical Co., Ltd, and has the following performance parameters:

performance of	Parameter(s)
		Appearance of the product	Colorless, transparent and slightly viscous liquid
Water content (%)	≤0.05
		Hydroxyl number (mg KOH/g)	330-350
Acid value (mg KOH/g)	≤0.08
		K+/ppm	≤5
pH	5.0-7.0
		Color number/APHA	≤30

。

Donol R4040 is a hard-foam polyether polyol, which is a polyether polyol with high activity and low hydroxyl value and using OTDA as an initiator, and can generate enough crosslinking degree and rigidity. It is produced by Shanghai Dongda chemical Co., Ltd, and has the following performance parameters:

performance of	Parameter(s)
		Appearance of the product	Yellow or wine red transparent viscous liquid
Water content (%)	≤0.20
		Hydroxyl value (mgKOH/g)	380-420
pH (isopropanol)	9.0-11.0
		PO residue (ppm)	≤80
Viscosity (25 ℃ C.) mPa.s	15000-30000
		Chroma (GD)	≤18

。

The polyester polyol AK7004 is produced by Korea Aijing chemistry, has a hydroxyl value of 260-270 mgKOH/g, a viscosity of no more than 7500-11500 mPa.s at 25 ℃, a water content of no more than 0.1% and an acid value of no more than 2.0 mgKOH/g.

Tris (2-chloropropyl) phosphate (TCPP), tris (2-chloroethyl) phosphate (TEP) and tris (2-chloroethyl) phosphate (TCEP) were produced by Yake science and technology, Inc., Jiangsu.

The catalysts POLYACAT 5, POLYACAT 8, Dabco BX405, K15 and POLYCAT 41 are all produced by gas chemical products (China) investment Limited (air chemical products (China) investment Limited).

The foam stabilizer B8545 is purchased from Yingxiao specialty Chemicals (Shanghai) Co., Ltd, and has the following performance parameters: the water content is less than or equal to 0.2 percent, the refraction (20 ℃) is 1.4400 to 1.4480, and the viscosity is 700 and 1000mPa.s/25 ℃.

Foam stabilizer B84813, purchased from winning industry group, is a hydrolysis-resistant polyether-modified polydimethylsiloxane copolymer and is used for manufacturing rigid polyurethane foam. The viscosity of the foam stabilizer at 25 ℃ is 600-1000 mPas.

Polyphenyl polymethylene polyisocyanates (abbreviated as PAPI) are produced by Bayer AG in Germany.

Example 1

The preparation method of the combined polyether polyol comprises the following steps:

putting polyester polyol AK 700480 parts, polyether polyol Donol C3055 parts, Donol R60495 parts and Donol R404010 parts into a reaction kettle, sequentially adding catalysts POLYACAT 3031 parts, Dabco BX 4052 parts, K152 parts, DABCO T0.5 parts, silicone oil B85452 parts, deionized water 0.9 parts, TCPP 20 parts, TEP 20 parts and foaming agent HFC-245fa 25 parts, and uniformly stirring to obtain the polyester polyol AK-245.

And (3) injecting the combined polyether and the PAPI by using a low-pressure foaming machine at a flow rate of 30g/s, and foaming and forming at room temperature to obtain the door and window section.

Example 2

The preparation method of the combined polyether polyol comprises the following steps:

putting PS 315880 parts of polyester polyol, Donol C30510 parts of polyether polyol and Donol R404010 parts into a reaction kettle, sequentially adding 3030.5 parts of catalyst POLYACAT, 81.5 parts of POLYACAT, 413 parts of POLYCAT, 1 part of DABCO T, 85453 parts of silicone oil B, 0.8 part of deionized water, 40 parts of TCEP and 23 parts of foaming agent HFC-245fa, and uniformly stirring to obtain the polyester polyol.

And (3) injecting the combined polyether and the PAPI by using a low-pressure foaming machine at a flow rate of 30g/s, and foaming and forming at room temperature to obtain the door and window section.

Example 3

Putting 241280 parts of polyester polyol PS and 40310 parts of polyether polyol into a reaction kettle, sequentially adding 3031.5 parts of catalyst POLYACAT, 82.5 parts of POLYACAT, K153 parts, 848132 parts of silicone oil, 1 part of deionized water, 25 parts of TCPP, 15 parts of TCEP and 24 parts of foaming agent HFC-245fa, and uniformly stirring to obtain the polyester polyol.

And (3) injecting the combined polyether and the PAPI by using a low-pressure foaming machine at a flow rate of 30g/s, and foaming and forming at room temperature to obtain the door and window section.

Example 4

The preparation method of the combined polyether polyol comprises the following steps:

putting polyester polyol AK 7004100 parts into a reaction kettle, sequentially adding catalyst Dabco BX 4051 parts, K153 parts, DABCO T2 parts, silicone oil B848133 parts, deionized water 0.5 part, TCPP 20 parts, TCEP 10 parts and foaming agent HFC-245fa 20 parts, and uniformly stirring to obtain the polyester polyol.

And (3) injecting the combined polyether and the PAPI by using a low-pressure foaming machine at a flow rate of 30g/s, and foaming and forming at room temperature to obtain the door and window section.

The results of the effect tests on the products obtained in examples 1 to 4 are shown in table 1 below.

The standards followed by the performance test are as follows:

the oxygen index test standard is: GB/T2406.2-2009

The dimensional stability test criteria were: GB/T8811-

The thermal conductivity test standard is as follows: GB/T3399-

And the compression strength detection standard GB 8813-2008.

TABLE 1 comparison of Performance data for polyurethane foams in examples 1-4

As can be seen from Table 1, the polyurethane foams prepared using the foams described herein all have oxygen indices greater than 30%, achieve the flame retardant rating of B1, and at a temperature of at least 0 ℃, the foams described herein can still foam properly.

The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.