US4900463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration lubricant blends
Assignee: Honeywell International Inc
•
Filing: 1989-05-23
•
Granted: 1990-02-13
•
Expires: 2009-05-23
Abstract
Abstract The present invention provides a lubricating composition. The composition comprises a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25° C. The blend is miscible in combination with the tetrafluoroethane in the range between 0° C. and at least +5° C.
Inventors
- 👤 Raymond H. P. Thomas
- 👤 Hillel Magid
- 👤 David P. Wilson
- 👤 John W. Pelava
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:31
CPC Classifications
C; C10; C10M; C10M171/00; C10M171/008; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M107/38; C10M111/00; C10M111/04; C09K2205/00; C09K2205/24; C10M2207/00; C10M2207/04; C10M2207/042; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/023; C10M2213/04; C10M2213/043; C10M2213/06; C10M2213/0606; C10M2213/062; C10M2213/0623; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/08; C10M2227/083; C10N; C10N2020/00; C10N2020/01; 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
76 words
A lubricating composition comprising a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C. and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25° C. wherein said blend is miscible in combination with tetrafluoroethane in the range of 0° C. to at least +5° C.
Claim 2
Dependent Claim
76 words
A lubricating composition comprising a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C. and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25° C. wherein said blend is miscible in combination with tetrafluoroethane in the range of 0° C. to at least +5° C.
Claim 3
Dependent Claim
25 words
The lubricating composition of claim 1 wherein the weight ratio of said polyoxyalkylene glycol to said polymeric chlorotrifluoroethylene oil is about 10:20 to about 56:44.
Claim 4
Dependent Claim
22 words
The lubricating composition of claim 1 wherein said polyoxyalkylene glycol is a random or block copolymer of ethylene oxide and propylene oxide.
Claim 5
Dependent Claim
16 words
The lubricating composition of claim 1 wherein said polyoxyalkylene glycol is a polymer of propylene oxide.
Claim 6
Dependent Claim
108 words
A composition for use in compression refrigeration comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25° C. wherein said blend is miscible in combination with said tetrafluoroethane in the range between 0° C. and at least +5° C. and said composition has a viscosity of about 60 to about 120 centistokes at 37° C.
Claim 7
Dependent Claim
108 words
A composition for use in compression refrigeration comprising: (a) tetrafluoroethane; and (b) a sufficient amount to provide lubrication of a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25° C. wherein said blend is miscible in combination with said tetrafluoroethane in the range between 0° C. and at least +5° C. and said composition has a viscosity of about 60 to about 120 centistokes at 37° C.
Claim 8
Dependent Claim
10 words
The composition of claim 5 wherein said tetrafluoroethane is 1,1,1,2-tetrafluoroethane.
Claim 9
Dependent Claim
24 words
The composition of claim 5 wherein the weight ratio of said polyoxyalkylene glycol to said chlorotrifluoroethylene based oil is about 10:90 to about 56:44.
Claim 10
Dependent Claim
21 words
The composition of claim 5 wherein the weight ratio of said tetrafluoroethane to said blend is about 99:1 to about 50:50.
Claim 11
Dependent Claim
18 words
The composition of claim 5 wherein said polyoxyalkylene glycol has at least 80 percent by weight oxyalkylene groups.
Claim 12
Dependent Claim
81 words
The composition of claim 5 wherein said polyoxyalkylene glycol has the formula R.sub.1 [(R.sub.2 O).sub.n R.sub.3 ].sub.m wherein R 1 is a residue of a compound having 1 to 8 hydroxyl groups or a hydroxyl group, R 2 is an alkylene moiety having 2 to 4 carbon atoms, R 3 is hydrogen or an alkyl group with 1 to 10 carbon atoms, and n and m are numbers such that the molecular weight of said polyoxyalkylene glycol is 300 to 2000.
Claim 13
Dependent Claim
21 words
The composition of claim 5 wherein said polyoxyalkylene glycol is a random or block copolymer of ethylene oxide and propylene oxide.
Claim 14
Dependent Claim
15 words
The composition of claim 5 wherein said polyoxyalkylene glycol is a polymer of propylene oxide.
Claim 15
Dependent Claim
18 words
The composition of claim 5 wherein the miscible range is between 0° C. and at least +10° C.
Claim 16
Dependent Claim
18 words
The composition of claim 5 wherein the miscible range is between 0° C. and at least +20° C.
Claim 17
Independent Claim
96 words
A method for improving lubrication in compression refrigeration equipment using tetrafluoroethane as a refrigerant consisting of employing as a lubricant a single phase blend of (i) at least one polyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8 to about 1000 centistokes at 25° C. wherein said blend is miscible in combination with said tetrafluoroethane in the range between 0° C. and at least +5° C.
Claim 18
Independent Claim
96 words
A method for improving lubrication in compression refrigeration equipment using tetrafluoroethane as a refrigerant consisting of employing as a lubricant a single phase blend of (i) at least one polyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37° C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8 to about 1000 centistokes at 25° C. wherein said blend is miscible in combination with said tetrafluoroethane in the range between 0° C. and at least +5° C.
Claim 19
Dependent Claim
10 words
The method of claim 15 wherein said tetrafluoroethane is 1,1,1,2-tetrafluoroethane.
Claim 20
Dependent Claim
24 words
The method of claim 15 wherein the weight ratio of said polyoxyalkylene glycol to said chlorotrifluoroethylene based oil is about 10:90 to about 56:44.
Claim 21
Dependent Claim
21 words
The method of claim 15 wherein the weight ratio of said tetrafluoroethane to said blend is about 99:1 to about 50:50.
Claim 22
Dependent Claim
18 words
The method of claim 15 wherein said polyoxyalkylene glycol has at least 80 percent by weight oxyalkylene glycols.
Claim 23
Dependent Claim
80 words
The method of claim 15 wherein said polyoxyalkylene glycol has the formula R.sub.1 --[(R.sub.2 O).sub.n R.sub.3 ].sub.m wherein R 1 is a residue of a compound having 1 to 8 hydroxyl groups or a hydroxyl group, R 2 is an alkylene moiety having 2 to 4 carbon atoms, R 3 is hydrogen or alkyl group with 1 to 10 carbon atoms, and n and m are numbers such that the molecular weight of said polyoxyalkylene glycol is 300 to 2000.
Claim 24
Dependent Claim
18 words
The method of claim 15 wherein said polyoxyalkylene glycol is a copolymer of ethylene oxide and propylene oxide.
Claim 25
Dependent Claim
15 words
The method of claim 15 wherein said polyoxyalkylene glycol is a polymer of propylene oxide.
References Cited (Backward Citations)
DE2750980A1
Cited
US4267064A
Cited
US4302343A
Cited
US4428854A
Cited
US4431557A
Cited
JPS5751795A
Cited
US4454052A
Cited
JPS59179899A
Cited
JPS6096684A
Cited
US4755316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |