Claims
- 1. A composition for use in compression refrigeration and air-conditioning comprising:
- (a) 1,1-dichloro-2,2,2-trifluoroethane; and
- (b) a sufficient amount of a lubricant therefor wherein said lubricant is an aliphatic hydrogen-containing compound having greater than about 80 percent exterior primary hydrogens, has a viscosity of about 5 to about 150 centistokes at 37.degree. C., and is miscible in combination with said 1,1-dichloro-2,2,2-trifuloroethane in the range of about 0.degree. C. to at least +20.degree. C. wherein said lubricant substantially reduces the formation of 1-chloro-2,2,2-trifluoroethane.
- 2. The composition of claim 1 wherein said aliphatic hydrogen-containing compound having greater than about 80 percent exterior primary hydrogens is selected from the group consisting of polydimethyl siloxane, methyltrifluoropropylsiloxane, and 50:50 methyltrifluoropropyl/dimethyl siloxane copolymer.
- 3. The composition of claim 2 wherein said compound is polydimethyl siloxane.
- 4. The composition of claim 2 wherein said compound is methyltrifuloropropylsiloxane.
- 5. The composition of claim 2 wherein said compound is 50:50 methyltrifluoropropyl/dimethyl siloxane copolymer.
- 6. The composition of claim 1 which further comprises an effective amount of stabilizer to inhibit the reaction of said 1,1-dichloro-2,2,2-trifluoroethane to form 1-chloro-2,2,2-trifluoroethane.
- 7. The composition of claim 6 wherein said stabilizer is alpha methyl styrene.
- 8. The composition of claim 6 wherein said stabilizer is zinc dithio dialkyl phosphate.
- 9. A method for improving lubrication in compression refrigeration and air-conditioning equipment using 1,1-dichloro-2,2,2-trifluoroethane as a refrigerant comprising the step of:
- employing an aliphatic hydrogen-containing lubricant having greater than about 80 percent exterior primary hydrogens wherein said lubricant has a viscosity of about 5 to about 150 centristokes at 37.degree. C. and ismiscible in combination with 1,1-dichloro-2,2,2-trifluoroethane in the range of about 0.degree. to at least +20.degree. C. wherein said lubricant substantially reduces the formation of 1-chloro-2,2,2-trifluoroethane.
- 10. The method of claim 9 wherein said aliphatic hydrogen-containing lubricant having greater than about 80 percent exterior primary hydrogens is selected from the group consisting of polydimethyl siloxane, methyltrifluoropropyl siloxane, and 50:50 methyltrifluoropropyl/dimethyl siloxane copolymer.
- 11. The method of claim 10 wherein said lubricant is polydimethyl siloxane.
- 12. The method of claim 10 wherein said lubricant is methyltrifluoropropylsiloxane.
- 13. The method of claim 10 wherein said lubricant is 50:50 methyltrifluoropropyl/dimethyl siloxane copolymer.
- 14. The method of claim 9 which further comprises an effective amount of stabilizer to inhibit the reaction of said 1,1-dichloro-2,2,2-trifluoroethane to form 1-chloro-2,2,2-trifluoroethane.
- 15. The composition of claim 14 wherein said stabilizer is alpha methyl styrene.
- 16. The composition of claim 14 wherein said stabilizer is zinc dithio dialkyl phosphate.
- 17. A method of substantially reducing the formation of 1-chloro-2,2,2-trifluoroethane in compressioned refrigeration and air-conditioning equipment using 1,1-dichloro-2,2,2-trifluoroethane as a refrigerant comprising the step of:
- employing an aliphatic hydrogen-containing lubricant having greater than about 80 percent exterior primary hydrogens wherein said lubricant has a viscosity of about 5 to about 150 centistokes at 37.degree. C. and is miscible in combination with said 1,1-dichloro-2,2,2-trifuloroethane in the range of about 0.degree. C. to at least about 20.degree. C.
- 18. The method of claim 17 wherein said lubricant is polydimethyl siloxane.
- 19. The method of claim 17 wherein said lubricant is methyltrifluoropropylsiloxane.
- 20. The method of claim 17 wherein said lubricant is 50:50 methyltrifluoropropyl/dimethyl siloxane copolymer.
Parent Case Info
This application is a division, of application Ser. No. 780,562, filed Oct. 18, 1991, U.S. Pat. No. 5,108,632 which is a continuation of U.S. Pat. No. 521,794 filed May 10, 1990, now abandoned.
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Divisions (1)
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Number |
Date |
Country |
Parent |
780562 |
Oct 1991 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
521794 |
May 1990 |
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