US4975212A
Expired / Lapsed
US
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Fluorinated lubricating compositions
Assignee: Honeywell International Inc
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Filing: 1988-12-27
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Granted: 1990-12-04
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Expires: 2008-12-27
Abstract
Abstract The present invention provides a novel lubricating composition comprising a polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof. The composition has a molecular weight between 300 and 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20. The composition is miscible in combination with tetrafluoroethane in the range between -40° C. and at least +20° C. The novel lubricating composition is particularly useful with tetrafluoroethane in refrigeration and air-conditioning applications. As such, the present invention also provides a composition for use in refrigeration and air-conditioning comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of fluorinated alkyl group on at least one end thereof. The lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20. The lubricant is miscible in combination with the tetrafluoroethane in the range between about -40° C. and at least about +20° C.
Inventors
- 👤 Raymond H. P. Thomas
- 👤 David P. Wilson
- 👤 David Nalewajek
- 👤 Hang T. Pham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
C; C10; C10M; C10M171/00; C10M171/008; C10M105/00; C10M105/50; C10M107/00; C10M107/38; C10M111/00; C10M111/04; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/026; C10M2207/027; C10M2207/028; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/144; C10M2207/146; C10M2207/26; C10M2207/262; C10M2207/28; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/102; C10M2211/00; C10M2211/003; C10M2211/02; C10M2211/022; C10M2211/06; C10M2211/08; C10M2213/00; C10M2213/02; C10M2213/023; C10M2213/04; C10M2213/043; C10M2213/06; C10M2213/0606; C10M2213/062; C10M2213/0623; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/086; C10M2215/24; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/065; C10M2225/00; C10M2225/02; C10M2227/00; C10M2227/09; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10M2229/051; C10N; C10N2010/00; C10N2010/12; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
99 words
A lubricating composition comprising a polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said polyoxyalkylene glycol is formed from copolymer of ethylene oxide and propylene oxide, copolymer of ethylene oxide and butylene oxide, or copolymer of propylene oxide and butylene oxide and said composition has a molecular weight between 300 and 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with tetrafluoroethane in the range between -40° C. and at least +20° C.
Claim 2
Dependent Claim
99 words
A lubricating composition comprising a polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said polyoxyalkylene glycol is formed from copolymer of ethylene oxide and propylene oxide, copolymer of ethylene oxide and butylene oxide, or copolymer of propylene oxide and butylene oxide and said composition has a molecular weight between 300 and 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with tetrafluoroethane in the range between -40° C. and at least +20° C.
Claim 3
Dependent Claim
71 words
The lubricating composition of claim 1 wherein said composition has the formula R.sub.1 OR.sub.2 [CHR.sub.3 CH(CH.sub.3)O].sub.m (CH.sub.2 CH.sub.2 O).sub.n --R.sub.4 wherein R 3 is hydrogen or --CH 3 , m is 4 to 36, n is 0 to 36, R 2 is --CH(CH 3 )CH 2 O-- or a direct bond, and R 1 and R 4 are independently selected from the group consisting hydrogen, alkyl group, and fluorinated alkyl group.
Claim 4
Dependent Claim
15 words
The lubricating composition of claim 2 wherein R 2 is --CH(CH 3 )CH 2 O--.
Claim 5
Dependent Claim
13 words
The lubricating composition of claim 2 wherein R 2 is a direct bond.
Claim 6
Dependent Claim
13 words
The lubricating composition of claim 2 wherein R 3 is CH 3 .
Claim 7
Dependent Claim
47 words
The lubricating composition of claim 2 wherein at least one of said R 1 and R 4 is a fluorinated alkyl group of the formula --(CH 2 ) x (CF 2 ) y CF 3 wherein x is 1 to 4 and y is 0 to 15.
Claim 8
Dependent Claim
19 words
The lubricating composition of claim 1 Wherein said viscosity is about 35 to about 150 centistokes at 37° C.
Claim 9
Dependent Claim
19 words
The lubricating composition of claim 4 wherein both of said R 1 and R 4 are fluorinated alkyl groups.
Claim 10
Dependent Claim
93 words
A composition for use in refrigeration and air-conditioning comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with said tetrafluoroethane in the range between about -40° C. and at least about +20° C.
Claim 11
Dependent Claim
93 words
A composition for use in refrigeration and air-conditioning comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with said tetrafluoroethane in the range between about -40° C. and at least about +20° C.
Claim 12
Dependent Claim
10 words
The composition of claim 9 wherein said tetrafluoroethane is 1,1,1,2-tetrafluoroethane.
Claim 13
Dependent Claim
20 words
The composition of claim 9 wherein the miscible range is between about -40° C. and at least about +30° C.
Claim 14
Dependent Claim
20 words
The composition of claim 9 wherein the miscible range is between about -40° C. and at least about +40° C.
Claim 15
Dependent Claim
20 words
The composition of claim 9 wherein the miscible range is between about -40° C. and at least about +50° C.
Claim 16
Dependent Claim
71 words
The composition of claim 9 wherein said lubricant has the formula R.sub.1 OR.sub.2 --[CHR.sub.3 CH(CH.sub.3)O].sub.m (CH.sub.2 CH.sub.2 O).sub.n --R.sub.4 wherein R 1 and R 4 are independently selected from the group consisting of hydrogen, alkyl group, and fluorinated alkyl group, m is 4 to 36, n is 0 to 36, R 2 is --CH(CH 3 )CH 2 O-- or a direct bond, and R 3 is hydrogen or --CH 3 .
Claim 17
Dependent Claim
12 words
The composition of claim 14 wherein R 2 is a direct bond.
Claim 18
Dependent Claim
12 words
The composition of claim 14 wherein R 3 is CH 3 .
Claim 19
Dependent Claim
46 words
The composition of claim 14 wherein at least one of said R 1 and R 4 is a fluorinated alkyl group of the formula --(CH 2 ) x (CF 2 ) y CF 3 wherein x is 1 to 4 and y is 0 to 15.
Claim 20
Dependent Claim
18 words
The composition of claim 14 wherein said viscosity is about 35 to about 150 centistokes at 37° C.
Claim 21
Dependent Claim
18 words
The composition of claim 15 wherein both of said R 1 and R 4 are fluorinated alkyl groups.
Claim 22
Independent Claim
96 words
A method for improving lubrication in refrigeration and air-conditioning equipment using tetrafluoroethane as a refrigerant comprising the step of: employing as a lubricant at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with said tetrafluoroethane in the range between about -40° C. and at least about +20° C.
Claim 23
Independent Claim
96 words
A method for improving lubrication in refrigeration and air-conditioning equipment using tetrafluoroethane as a refrigerant comprising the step of: employing as a lubricant at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with said tetrafluoroethane in the range between about -40° C. and at least about +20° C.
Claim 24
Dependent Claim
104 words
A composition for us in refrigeration and air-conditioning comprising: (a) a refrigerant selected from the group consisting of dichlorodifluoromethane, chlorodifluoromethane and monochlorodifluoromethane/1-chloro-1,1,2,2,2-pentafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with said refrigerant in the range between about -40° C. and at least about +20° C.
Claim 25
Dependent Claim
104 words
A composition for us in refrigeration and air-conditioning comprising: (a) a refrigerant selected from the group consisting of dichlorodifluoromethane, chlorodifluoromethane and monochlorodifluoromethane/1-chloro-1,1,2,2,2-pentafluoroethane; and (b) a sufficient amount to provide lubrication of at least one polyoxyalkylene glycol having a cap of a fluorinated alkyl group on at least one end thereof wherein said lubricant has a molecular weight of about 300 to about 3,000, a viscosity of about 5 to about 150 centistokes at 37° C., and a viscosity index of at least 20, and is miscible in combination with said refrigerant in the range between about -40° C. and at least about +20° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |