阅读说明：本技术 气溶胶清洁组合物 (Aerosol cleaning composition ) 是由 威廉·C·马丁 皮尔斯·A·皮隆 梅塞德塔·S·惠特迈尔 埃里克·J·马蒂尼 马修·E·莫里 于 2018-05-03 设计创作，主要内容包括：一种不可燃气溶胶清洁组合物,包含反式1,2-二氯乙烯、1,1,1,2,2,3,4,5,5,5-十氟戊烷、1,1,1,3,3-五氟丙烷、HFC-134a和二氧化碳。一种不可燃气溶胶清洁组合物包含溶剂的共混物以及喷射剂的共混物,所述溶剂的共混物包含1,1,1,3,3-五氟丙烷和至少一种其他氢氟烃溶剂或反式1,2-二氯乙烯溶剂；所述喷射剂的共混物包含HFC-134a和二氧化碳,其中所述气溶胶清洁组合物被配制成当在高输出胡蜂和大黄蜂气溶胶喷雾型罐中提供时用于清洁位于离使用者约10英尺远的目标。(A non-flammable aerosol cleaning composition comprising trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane, HFC-134a and carbon dioxide. A non-flammable aerosol cleaning composition comprising a blend of solvents comprising 1,1,1,3, 3-pentafluoropropane and at least one other hydrofluorocarbon solvent or trans 1, 2-dichloroethylene solvent; the blend of propellants comprises HFC-134a and carbon dioxide, wherein the aerosol cleaning composition is formulated for cleaning a target located about 10 feet away from a user when provided in a high output wasp and hornet aerosol spray-type can.)

1. A non-flammable aerosol cleaning composition comprising:

trans-1, 2-dichloroethylene;

1,1,1,2,2,3,4,5,5, 5-decafluoropentane;

1,1,1,3, 3-pentafluoropropane; and

a blend of propellants comprising 1,1,1, 2-tetrafluoroethane (HFC-134a) and carbon dioxide.

2. The non-flammable aerosol cleaning composition of claim 1, wherein the trans 1, 2-dichloroethylene is present in a concentration of about 55% to about 70% (w/w) by weight of the cleaning composition.

3. The non-flammable aerosol cleaning composition of claim 1, wherein the 1,1,1,2,2,3,4,5,5, 5-decafluoropentane is present at a concentration of about 10% to about 20% w/w.

4. The non-flammable aerosol cleaning composition of claim 1, wherein the 1,1,1,3, 3-pentafluoropropane is present in a concentration of about 5% to about 15% w/w.

5. The non-flammable aerosol cleaning composition of claim 1, wherein the HFC-134a is present at a concentration of about 5% to about 15% w/w.

6. The non-flammable aerosol cleaning composition of claim 1, wherein the carbon dioxide is present at a concentration of about 2% to about 7% w/w.

7. The non-flammable aerosol cleaning composition of claim 1, wherein the concentrations of trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane, HFC-134a and carbon dioxide add up to about 100% w/w of the weight of the non-flammable aerosol cleaning composition.

8. The non-flammable aerosol cleaning composition of claim 1, wherein the non-flammable aerosol cleaning composition consists of from about 55% to about 70% w/w trans-1, 2-dichloroethylene, from about 10% to about 20% w/w 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, from about 5% to about 15% w/w 1,1,1,3, 3-pentafluoropropane, from about 5% to about 15% w/w HFC-134a, and from about 2% to about 7% w/w carbon dioxide.

9. The non-combustible aerosol cleaning composition of claim 1, wherein the aerosol cleaning composition is formulated for cleaning a target located about 10 feet away from a user when supplied in a high output wasp and hornet aerosol spray can.

10. A non-flammable aerosol cleaning composition comprising:

a blend of solvents comprising 1,1,1,3, 3-pentafluoropropane and at least one other hydrofluorocarbon solvent or trans 1, 2-dichloroethylene solvent; and

a blend of propellants comprising HFC-134a and carbon dioxide,

wherein the aerosol cleaning composition is formulated for cleaning a target located about 10 feet away from a user when supplied in a high output wasp and hornet aerosol spray-type can.

11. The non-flammable aerosol cleaning composition of claim 10, wherein the blend of solvents comprises trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, and 1,1,1,3, 3-pentafluoropropane.

12. The non-flammable aerosol cleaning composition of claim 10, wherein the non-flammable aerosol cleaning composition comprises: trans-1, 2-dichloroethylene at a concentration of about 55% to about 70% w/w, 1,1,2,2,3,4,5,5, 5-decafluoropentane at a concentration of about 10% to about 20% w/w, 1,1,1,3, 3-pentafluoropropane at a concentration of about 5% to about 15% w/w, HFC-134a at a concentration of about 5% to about 15% w/w, and carbon dioxide at a concentration of about 2% to about 7% w/w.

13. The non-flammable aerosol cleaning composition of claim 12, wherein the sum of the concentrations of the trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane, HFC-134a and carbon dioxide is about 100% w/w of the weight of the non-flammable aerosol cleaning composition.

14. The non-flammable aerosol cleaning composition of claim 10, wherein the non-flammable aerosol cleaning composition has no flash point when tested according to the 31.4 spray aerosol ignition distance test and the 31.5 closed space ignition test of GHS aerosol flammability (2009).

15. The non-flammable aerosol cleaning composition of claim 10, wherein the aerosol cleaning composition is formulated to meet the criteria in terms of Airbus UK ABR9-0140 universal cleaning solvent (ABR9-0140 phase 6 [ 2000-2 months ] modified notice phase 5 [ 2009-11 months 11 ]) in terms of appearance, odor, flash point, evaporation residue, and non-corrosive effect in section 4.1.1.2.

16. The non-combustible aerosol cleaning composition of claim 10, wherein the aerosol cleaning composition is formulated to meet the criteria in the interlayer corrosion test, the paint softening test, the hydrogen embrittlement test, and the stress corrosion cracking test of boeing D617487 revision T.

Disclosure of Invention

High pressure, high output, non-combustible aerosol cleaning compositions for cleaning and degreasing aircraft components are provided according to various embodiments. The aerosol cleaning composition may be formulated to provide sufficient output pressure to reach and clean a target located about 10 feet vertically above the user when supplied in an aerosol assembly comprising a high output aerosol valve and a nozzle. In addition, the aerosol cleaning compositions can be formulated to effectively clean and degrease hydraulic fluids, pneumatic lubricants, and combustion byproducts on aircraft components (e.g., jet engines).

In one aspect, a non-flammable aerosol cleaning composition may comprise: trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane; and a propellant blend comprising 1,1,1, 2-tetrafluoroethane (HFC-134a) and carbon dioxide.

In some embodiments, trans 1, 2-dichloroethylene may be present at a concentration of from about 55% to about 70% (w/w), by weight of the cleaning composition. 1,1,1,2,2,3,4,5,5, 5-decafluoropentane may be present at a concentration of about 10% to about 20% w/w, and 1,1,1,3, 3-pentafluoropropane may be present at a concentration of about 5% to about 15% w/w. Additionally, HFC-134a may be present at a concentration of from about 5% to about 15% w/w and carbon dioxide is present at a concentration of from about 2% to about 7% w/w.

In another aspect, a non-flammable aerosol cleaning composition may comprise a blend of solvents comprising 1,1,1,3, 3-pentafluoropropane and at least one other hydrofluorocarbon solvent or trans 1, 2-dichloroethylene solvent, and a blend of propellants comprising HFC-134a and carbon dioxide. The non-combustible aerosol cleaning composition may be formulated for cleaning a target located about 10 feet away when supplied in a high output wasp and hornet aerosol spray-type can.

In one embodiment, the blend of solvents may comprise trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, and 1,1,1,3, 3-pentafluoropropane.

For example, the non-flammable aerosol cleaning composition may comprise trans-1, 2-dichloroethylene at a concentration of about 55% to about 70% w/w, 1,1,2,2,3,4,5,5, 5-decafluoropentane at a concentration of about 10% to about 20% w/w, 1,1,1,3, 3-pentafluoropropane at a concentration of about 5% to about 15% w/w, HFC-134a at a concentration of about 5% to about 15% w/w, and carbon dioxide at a concentration of about 2% to about 7% w/w. In some embodiments, the sum of the concentrations of trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane, HFC-134a and carbon dioxide may be about 100% w/w of the weight of the non-flammable aerosol cleaning composition.

In any of the preceding embodiments, the aerosol cleaning composition can be classified as non-flammable according to the test methods outlined in section 31 of UN2009, according to the flame ignition distance test and the enclosed space ignition test. Additionally, the aerosol cleaning composition may be formulated to meet the criteria in section 4.1.1 appearance, section 4.1.2 odor, section 4.1.3 flash point, section 4.1.4 evaporative residue, and section 4.1.7 non-corrosive effect of Airbus UK ABR9-0140 universal cleaning solvent (ABR9-0140, phase 6 [2 months 2000 ] modified notice phase 5 [ 11 months 11 days 2009 ]). The non-flammable aerosol cleaning composition may also be formulated to meet the criteria in the interlayer corrosion test, paint softening test, hydrogen embrittlement test, and stress corrosion cracking test of boeing D617487 revision T.

Other aspects, objects, and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

Detailed Description

While the present disclosure is susceptible of embodiment in various forms, there is shown in the drawings and will hereinafter be described a presently preferred embodiment with the understanding that the present disclosure is to be considered an exemplification and is not intended to limit the disclosure to the specific embodiment illustrated.

According to various embodiments, aerosol cleaning compositions for cleaning and degreasing aircraft components are provided. The aerosol cleaning compositions can be formulated as non-flammable compositions that can effectively dissolve and remove hydraulic fluids, pneumatic lubricants, combustion byproducts, and other types of contaminating deposits on aircraft components (e.g., jet engine surfaces) without exposing the user to harmful solvent vapors, such as n-propyl bromide vapor.

In addition, the aerosol cleaning composition can be formulated for use in high pressure, high output aerosol systems. In such embodiments, the aerosol cleaning composition may be formulated with a blend of propellants and at least one solvent and supplied in an aerosol component comprising a high output aerosol valve and a nozzle to provide a high pressure, high output aerosol system for spraying and cleaning a target located about 10 feet away from a user. High pressure, high output aerosol systems comprising aerosol cleaning compositions according to various embodiments of the present disclosure may be used by a user to spray and clean aircraft components (e.g., the cold section of a jet engine), which may be located about 10 feet vertically above the user.

According to one embodiment, the aerosol cleaning composition may be formulated with a blend of a solvent and/or a cleaning agent and at least one propellant. Suitable solvents and cleaning agents may include hydrofluorocarbons (e.g., 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane), hydrofluoroethers (e.g., methoxynonafluorobutane (HFE-7100)), hydrofluoroolefins (e.g., trans-1-chloro-3, 3, 3-trifluoropropene), and dichloroethylene (e.g., trans-1, 2 dichloroethylene). Suitable propellants may include Hydrofluorocarbon (HFC) liquefied gases (e.g., 1,1,1, 2-tetrafluoroethane (HFC-134a)), Hydrofluoroolefin (HFO) gases (e.g., trans-1, 3,3, 3-tetrafluoroprop-1-ene (HFO1234ze) and 2,3,3, 3-tetrafluoroprop-1-ene (HFO1234 yf)), and carbon dioxide.

Some properties of the aerosol cleaning composition (e.g., flammability and ability to propel the cleaning composition from the aerosol component) can change rapidly with the selection of the components and their amounts. Accordingly, the applicant of the present application has invested a great deal of time and effort in formulating aerosol cleaning compositions that are non-flammable, high pressure, high output, and can clean troublesome contaminants, such as hydraulic fluids, pneumatic lubricants, and combustion byproducts, from aircraft components.

In one embodiment, the aerosol cleaning composition may be formulated with a blend of propellants, such that the cleaning composition is continuously propelled at high pressure and high output from a high output aerosol assembly to clean a target located up to 10 feet away. In such embodiments, the cleaning composition may be disposed in an aerosol canister component comprising a high output valve and a nozzle, such as an aerosol system component designed for wasp and bumblebee spray removal.

In some embodiments, the aerosol cleaning composition may be formulated with at least two different propellants. For example, aerosol compositions may be formulated with a dual spray system comprising Hydrofluorocarbon (HFC) liquefied gases and carbon dioxide. In one embodiment, the aerosol cleaning composition may comprise from about 3.0 percent (%) to about 20.0% (w/w) HFC-134a, preferably from about 4.0% to about 17.0% w/w HFC-134a, more preferably from about 5.0% to about 15.0% w/w HFC-134a, and from about 1.0% to about 9.0% w/w carbon dioxide, preferably from about 2.0% to about 7.0% w/w carbon dioxide, more preferably from about 3.0% to about 6% w/w carbon dioxide, by weight.

Propellant and solvent options for aerosol cleaning compositions are narrow due to high pressure, high output and non-flammability requirements. For example, trans-1, 3,3, 3-tetrafluoropropan-1-ene (HFO-1234ze) has not been successful as a non-flammable propellant, and methoxynonafluorobutane (HFE-7100) has only been somewhat successful in providing the required high pressure, high output non-flammable aerosol solvent in a cleaning system.

Furthermore, the high pressure and high output requirements for aerosol cleaning systems make it more difficult to mitigate the flammability of aerosol cleaning compositions. Some blends of propellants and solvents provide the desired spray output pressure and contaminant solvency, but render the composition flammable. Some blends provide non-flammable aerosol cleaning compositions with the desired contaminant dissolution capabilities, but fail to provide the desired spray output pressure. It has been surprisingly found that aerosol cleaning compositions formulated with specific amounts of a suitable synergistic combination of a propellant comprising 1,1,1,3, 3-pentafluoropropane and a solvent can effectively reduce the flammability of the aerosol cleaning composition while still providing the desired high pressure, high output aerosol system.

In one embodiment, the aerosol cleaning composition may be formulated with a blend of trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane and 1,1,1,3, 3-pentafluoropropane. The amounts of trans-1, 2-dichloroethylene and 1,1,1,2,2,3,4,5,5, 5-decafluoropentane can be formulated to increase the solvency for hydraulic fluids, combustion byproducts, and other contaminants. Aerosol cleaning compositions may be formulated as follows: from about 50% to about 75% w/w, preferably from about 55% to about 70% w/w, more preferably from about 60% to about 68% w/w trans-1, 2-dichloroethylene, and from about 5% to about 25% w/w, preferably from about 10% to about 20% w/w, more preferably from about 12% to about 18% w/w 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, and from about 3% to about 20% w/w, preferably from about 5% to about 15% w/w, more preferably from about 7% to about 13% w/w 1,1,1,3, 3-pentafluoropropane.

In one embodiment, the aerosol cleaning composition may comprise from about 55% to about 70% w/w trans-1, 2-dichloroethylene, from about 10% to about 20% w/w 1,1,1,2,2,3,4,5,5, 5-decafluoropentane and from about 5% to about 15% w/w 1,1,1,3, 3-pentafluoropropane, from about 5% to about 15% w/w HFC134a and from about 2% to about 7% carbon dioxide. In some embodiments, the aerosol cleaning composition may be formulated such that the weight percentages of trans-1, 2-dichloroethylene, 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, 1,1,1,3, 3-pentafluoropropane, HFC134a and carbon dioxide total about 100% of the weight of the aerosol cleaning composition.

Samples of aerosol cleaning compositions comprising from about 55% to about 70% w/w trans-1, 2-dichloroethylene, from about 10% to about 20% w/w 1,1,1,2,2,3,4,5,5, 5-decafluoropentane, from about 5% to about 15% w/w 1,1,1,3, 3-pentafluoropropane, from about 5% to about 15% w/w HFC134a and from about 2% to about 7% carbon dioxide were prepared and tested. The sample composition effectively removed hydraulic and lubricating fluids and dried quickly without leaving a residue. The solvent phase of the sample composition was evaluated and classified as non-flammable according to the Global Harmonized System (GHS) flammable (and combustible) Liquids (globaly harmed System (GHS) standards). Furthermore, the sample composition was compatible with: high Density Polyethylene (HDPE), Low Density Polyethylene (LDPE), nylon 6, nylon 6/6, phenolic glue, polypropylene, Polyoxymethylene (POM), polyvinyl chloride (PVC) and polytetrafluoroethylene such as teflon.

Sample compositions were evaluated and determined to meet section 4.1.1-4.1.4 and section 4.1.7 according to Airbus UK ABR9-0140 universal cleaning solvent (ABR9-0140 phase 6 [2000 month 2 ] modified notice phase 5 [2009 month 11 day ]):

4.1.1 appearance of the product: the cleaning solvent should be a single phase liquid consisting of a single solvent or a fully miscible mixture of solvents that is free of precipitates and suspended solids. Results Conform to

4.1.2 Smell(s): the cleaning solvent should not generate an unpleasant odor during or after application. Results Conform to

4.1.3 Flash point: ASTM D93: no flash point was observed at 33 deg.C (91 ℃ F.).

Results Conform to

4.1.4 Residue after evaporation: the residue after evaporation should be expressed as the weight percentage of the residue after 50ml of solvent has been evaporated to dryness by a water bath and subsequently heated to constant weight in an oven at 110 ± 2 ℃. The weight of the residue should be determined immediately after cooling to room temperature in a high-performance desiccator.

Residue after evaporation: less than 5mg/50ml liquid results Conform to

4.1.7 No corrosion effect: unused metal sheets, each 75mm x 25mm x 0.91mm, which have been pretreated or plated on the surfaces and edges in the manner described, will be degreased by the method described in ABP-1294, dried at 100 ± 2 ℃ for 2 hours, cooled and weighed to 0.0001 g. The plates should then be completely immersed in the room temperature cleaning solvent in the plugged vessel for 168 hours, respectively. At the completion of the immersion period, the plate should be removed from the cleaning solvent and rinsed thoroughly under running cold water, gently wiping the surface with lint. They should be rinsed in distilled water and then with an equal volume of a mixture of methylated alcohol and acetone, dried at 100-105 ℃ for 2 hours, cooled and weighed to 0.0001 g. No attempt should be made to remove any corrosion products from the plate prior to weighing. Finally the plate should be visually inspected. The weight increase of the metal plate should not exceed 1mg and the weight decrease should not exceed 5 mg. Metal plate should notShowing pitting of the edges or surfaces, formation of adherent deposits, or other signs of corrosion.

Visual observation: without pitting, adhering deposits or other signs of corrosion

Result _ coincidence \ u

Furthermore, solvent cleaners according to revision T of boeing D617487; general cleaning evaluation sample composition:

corrosion test of interlayer：

Results Conform to

Paint softening test:

paint system 1: 0pencil hardness changed after a drying time after 24 hours exposure.

There was no discoloration or staining.

Paint system 2: 0pencil hardness changed after a drying time after 24 hours exposure.

There was no discoloration or staining.

Results Conform to

Hydrogen embrittlement test：

Sample preparation: type 1c, cadmium plated according to MIL-STD-870. (45% load, 150 hours, duration of notch immersion, room temperature.)

# 1: no damage occurred within 150 hours.

# 2: no damage occurred within 150 hours.

# 3: no damage occurred within 150 hours.

# 4: no damage occurred within 150 hours.

Results Conform to

Stress corrosion cracking: method for testing A

The product is as follows: AMS 4911: # 1-No significant cracking

# 2-No significant cracking

# 3-No significant cracking

AMS 4916: # 1-No significant cracking

# 2-No significant cracking

# 3-No significant cracking

Results Conform to

The sample compositions were also evaluated for their cleaning performance in terms of MIL-PRF-29608C, cleaning and cleaning lubricating compound, electrical contact, 4.5.7 cleaning efficiency at 2016, 11, month, 2 days.

Soil removal (% efficiency/soil removal)

All patents referred to herein, are hereby incorporated herein by reference in their entirety, whether or not specifically done so within the text of this disclosure.

In this disclosure, the words "a" or "an" should be taken to include both the singular and the plural. Conversely, any reference to plural items shall, where appropriate, include the singular. All percentages, whether specified or not, are weight percentages.

From the foregoing, it will be observed that numerous modifications and variations can be effectuated without departing from the true spirit and scope of the novel concepts of the present disclosure. It is to be understood that no limitation with respect to the specific embodiments illustrated is intended or should be inferred. The disclosure is intended to cover by the appended claims all such modifications as fall within the scope of the claims.