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US4948525A
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Lubricating oil compositions for refrigerators
Assignee: Eneos Corp
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Filing: 1989-03-31
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Granted: 1990-08-14
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Expires: 2009-03-31
Abstract
Abstract A lubricating oil composition for a refrigerator using therein 1,1,1,2-tetrafluoroethane as the refrigerant, comprising as the base oil a polyoxyalkylene glycol monoether of the following general formula <IMAGE> wherein R1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R2 is an alkylene group having 2-4 carbon atoms and a ratio of 0-0.8 between (the number of -OR2-group wherein R2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a specified pour point and a specified kinematic viscosity. In one embodiment, the lubricating oil composition may further comprise a specified phosphate and at least one kind of a specified epoxy compound to further improve the oil composition in properties.
Inventors
- 👤 Umekichi Sasaki
- 👤 Hiroshi Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:01
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10; C10M; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M111/00; C10M111/04; C10M169/00; C10M169/04; C10M171/00; C10M171/008; C09K2205/00; C09K2205/24; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/04; C10M2207/042; C10M2207/10; C10M2207/24; C10M2207/28; 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; C10M2211/0206; C10M2211/022; C10M2211/0225; C10M2211/024; C10M2211/0245; C10M2211/06; C10M2211/08; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/06; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A lubricating oil composition for a refrigerator in which 1,1,1,2-tetrafluoroethane is used as the refrigerant, consisting essentially of the base oil a polyoxyalkylene glycol monoether represented by the general formula R.sub.1 --(--OR.sub.2 --)--.sub.m OH wherein R 1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R 2 is an alkylene group having 2-4 carbon atoms and a ratio "α" of 0-0.8 between. (the number of --OR 2 -- group wherein R 2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having.a pour point of up to -10° C. and a kinematic viscosity of 2-110 cSt at 100° C., a number average molecular weight of 500-1500 and a ratio (Mw/Mn) of 1.0-1.20 between the weight average molecular weight (Mw) and the number average molecular weight (Mn).
Claim 2
Dependent Claim
133 words
A lubricating oil composition for a refrigerator in which 1,1,1,2-tetrafluoroethane is used as the refrigerant, consisting essentially of the base oil a polyoxyalkylene glycol monoether represented by the general formula R.sub.1 --(--OR.sub.2 --)--.sub.m OH wherein R 1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R 2 is an alkylene group having 2-4 carbon atoms and a ratio "α" of 0-0.8 between. (the number of --OR 2 -- group wherein R 2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having.a pour point of up to -10° C. and a kinematic viscosity of 2-110 cSt at 100° C., a number average molecular weight of 500-1500 and a ratio (Mw/Mn) of 1.0-1.20 between the weight average molecular weight (Mw) and the number average molecular weight (Mn).
Claim 3
Dependent Claim
19 words
A lubricating oil composition according to claim 1, wherein the refrigerator is a freeze-refrigeration apparatus or a car air-conditioner.
Claim 4
Dependent Claim
80 words
The composition according to claim 1 wherein said base oil is polyoxypropylene glycol monobutyl ether, polyoxyethyleneoxypropylene glycol monobutyl ether I, polyoxyethyleneoxypropylene glycol monobutyl ether 2, polyoxyethyleneoxypropylene glycol monobutyl ether 3, polyoxypropylene glycol monoethyl ether, polyoxyethyleneoxypropylene glycol monobutyl ether 4, polyoxypropylene glycol monopropyl ether, polyoxyethyleneoxypropylene glycol monopropyl ether, polyoxyethyleneoxypropylene glycol monoethyl/butyl ether, polyoxyethyleneoxypropylene glycol monobutyl ether 5, polyoxyethyleneoxypropylene glycol monobutyl ether 6, polyoxyethyleneoxypropylene glycol monobutyl ether 7, polyoxyethyleneoxytetramethylene glycol monobutyl ether, polyoxyethyleneoxypropylene glycol monobutyl ether 8, or polyoxypropylene glycol monomethyl ether.
Claim 5
Dependent Claim
177 words
A lubricating oil composition for a refrigerator in which 1,1,1,2-tetrafluoroethane is used as the refrigerant, consisting essentially of the base oil a polyoxyalkylene glycol monoether represented by the general formula R.sub.1 --(--OR.sub.2 --)--.sub.m OH wherein R 1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R 2 is an alkylene group having 2-4 carbon atoms and a ratio of 0-0.8 between (the number of --OR 2 -- group wherein R 2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a pour point of up to -10° C., a kinematic viscosity of 2-110 cSt at 100° C., a number average molecular weight of 500-1500 and a ratio (Mw/Mn) of 1.00-1.20 between the weight average molecular weight (Mw) and the number average molecular weight (Mn), further comprising: (A) a phosphate represented by the general formula ##STR6## wherein R 3 is an alkyl having 1-3 carbon atoms and n is an integer of 0-2, in an amount of 0.1-5.0 parts by weight per 100 parts by weight of the base oil.
Claim 6
Dependent Claim
177 words
A lubricating oil composition for a refrigerator in which 1,1,1,2-tetrafluoroethane is used as the refrigerant, consisting essentially of the base oil a polyoxyalkylene glycol monoether represented by the general formula R.sub.1 --(--OR.sub.2 --)--.sub.m OH wherein R 1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R 2 is an alkylene group having 2-4 carbon atoms and a ratio of 0-0.8 between (the number of --OR 2 -- group wherein R 2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a pour point of up to -10° C., a kinematic viscosity of 2-110 cSt at 100° C., a number average molecular weight of 500-1500 and a ratio (Mw/Mn) of 1.00-1.20 between the weight average molecular weight (Mw) and the number average molecular weight (Mn), further comprising: (A) a phosphate represented by the general formula ##STR6## wherein R 3 is an alkyl having 1-3 carbon atoms and n is an integer of 0-2, in an amount of 0.1-5.0 parts by weight per 100 parts by weight of the base oil.
Claim 7
Dependent Claim
19 words
A lubricating oil composition according to claim 4, wherein the refrigerator is a freeze-refrigeration apparatus or a car air-conditioner.
Claim 8
Dependent Claim
229 words
A lubricating oil composition for a refrigerator in which 1,1,1,2-tetrafluoroethane is used as the refrigerant, consisting essentially of the base oil a polyoxyalkylene glycol monoether represented by the general formula R.sub.1 --(--OR.sub.2 --)--.sub.m OH wherein R 1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R 2 is an alkylene group having 2-4 carbon atoms and a ratio of "α" if 0-0.8 between (the number of --OR 2 -- group wherein R 2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a pour point of up to -10° C., a kinematic viscosity of 2-110 cSt at 100° C., a number average molecular weight of 500-1500 and a ratio (Mw/Mn) of 1.00-1.20 between the weight average molecular weight (Mw) and the number average molecular weight (Mn), further comprising: (A) a phosphate represented by the general formula ##STR7## wherein R 3 is an alkyl group having 1-3 carbon atoms and n is an integer of 0-2, in an amount of 0.1-5.0 parts by weight per 100 parts by weight of the base oil and (B) at least one kind of an epoxy compound selected from the group consisting of (i) phenylglycidyl ether type epoxy compounds, (ii) epoxidized fatty acid monoesters and (iii) epoxidized vegetable oils, in an amount of 0.1-5.0 parts by weight per 100 parts by weight of the base oil.
Claim 9
Dependent Claim
229 words
A lubricating oil composition for a refrigerator in which 1,1,1,2-tetrafluoroethane is used as the refrigerant, consisting essentially of the base oil a polyoxyalkylene glycol monoether represented by the general formula R.sub.1 --(--OR.sub.2 --)--.sub.m OH wherein R 1 is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R 2 is an alkylene group having 2-4 carbon atoms and a ratio of "α" if 0-0.8 between (the number of --OR 2 -- group wherein R 2 is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a pour point of up to -10° C., a kinematic viscosity of 2-110 cSt at 100° C., a number average molecular weight of 500-1500 and a ratio (Mw/Mn) of 1.00-1.20 between the weight average molecular weight (Mw) and the number average molecular weight (Mn), further comprising: (A) a phosphate represented by the general formula ##STR7## wherein R 3 is an alkyl group having 1-3 carbon atoms and n is an integer of 0-2, in an amount of 0.1-5.0 parts by weight per 100 parts by weight of the base oil and (B) at least one kind of an epoxy compound selected from the group consisting of (i) phenylglycidyl ether type epoxy compounds, (ii) epoxidized fatty acid monoesters and (iii) epoxidized vegetable oils, in an amount of 0.1-5.0 parts by weight per 100 parts by weight of the base oil.
Claim 10
Dependent Claim
19 words
A lubricating oil composition according to claim 6, wherein the refrigerator is a freeze-refrigeration apparatus or a car air-conditioner.
References Cited (Backward Citations)
US3806455A
Cited
US4072027A
Cited
US4199461A
Cited
US4155865A
Cited
US4428854A
Cited
US4454052A
Cited
US4557850A
Cited
JPS58201879A
Cited
WO1984001165A1
Cited
US4793940A
Cited
US4699726A
Cited
US4755316A
Cited
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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |