US4248726A
Expired / Lapsed
US
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High-viscosity refrigerator oil compositions
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1978-05-05
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Granted: 1981-02-03
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Expires: 1998-05-05
Abstract
Abstract A high-viscosity refrigerator oil composition comprising (A) a polyglycol oil such as a polyoxypropylene glycol or an alkyl ether thereof and (B) 0.1-10% by weight, based on the total weight of (A) and (B), of a glycidyl ether type epoxy compound, an epoxidized fatty acid monoester and/or an epoxidized vegetable oil.
Inventors
- 👤 Kazuo Uchinuma
- 👤 Umekichi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C10M129/66; C10M171/00; C10M171/008; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/10; C10M2207/24; C10M2207/28; C10M2207/287; C10M2209/00; C10M2209/10; C10M2209/101; 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; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A high-viscosity refrigerator oil composition consisting essentially of: (A) 90-99.9% by weight of a polyglycol oil having a kinematic viscosity of 50-200 cSt at 98.9° C. and a viscosity index of at least 150, represented by the following formula R.sub.1 --O--(R.sub.2 O).sub.m --R.sub.3 ].sub.n wherein R 1 and R 3 are each a hydrogen atom, hydrocarbon radical or fatty acyl group and they may be identical with, or different from, each other, R 2 is an alkylene group, n is an integer of 1-6 and mxn equals at least 30, and (B) 0.1-10% by weight of at least one member selected from the group consisting of (1) glycidyl ether epoxy compounds, (2) epoxidized fatty acid monoesters and (3) epoxidized vegetable oils.
Claim 2
Dependent Claim
121 words
A high-viscosity refrigerator oil composition consisting essentially of: (A) 90-99.9% by weight of a polyglycol oil having a kinematic viscosity of 50-200 cSt at 98.9° C. and a viscosity index of at least 150, represented by the following formula R.sub.1 --O--(R.sub.2 O).sub.m --R.sub.3 ].sub.n wherein R 1 and R 3 are each a hydrogen atom, hydrocarbon radical or fatty acyl group and they may be identical with, or different from, each other, R 2 is an alkylene group, n is an integer of 1-6 and mxn equals at least 30, and (B) 0.1-10% by weight of at least one member selected from the group consisting of (1) glycidyl ether epoxy compounds, (2) epoxidized fatty acid monoesters and (3) epoxidized vegetable oils.
Claim 3
Dependent Claim
37 words
A high-viscosity refrigerator oil composition according to claim 1, wherein the polyglycol oil is a member selected from the group consisting of a polyoxypropylene glycol, a polyoxyethylene-polyoxypropylene glycol, and a monomethyl, monobutyl, glycerol or trimethylolpropane ether thereof.
Claim 4
Dependent Claim
36 words
A high-viscosity refrigerator oil composition according to claim 2, wherein the glycidyl ether epoxy compound is a member selected from the group consisting of phenylglycidyl ether, an alkylphenylglycidyl ether and a condensate of epichlorohydrin and bisphenol.
Claim 5
Dependent Claim
23 words
A high-viscosity refrigerator oil composition according to claim 3, wherein the alkylphenylglycidyl ether contains 1 to 3 C 4 -C 18 alkyl groups.
Claim 6
Dependent Claim
45 words
A high-viscosity refrigerator oil composition according to claim 1, wherein the epoxidized fatty acid monoester is a member selected from the group consisting of ester of an epoxidized C 12 -C 20 fatty acid with a C 1 -C 8 alcohol, phenol or an alkylphenol.
Claim 7
Dependent Claim
31 words
A high-viscosity refrigerator oil composition according to claim 1, wherein the epoxidized fatty acid monoester is a butyl, hexyl, benzyl, cyclohexyl, methoxyethyl, octyl, phenyl or t.-butylphenyl ester of epoxidized stearic acid.
Claim 8
Dependent Claim
24 words
A high-viscosity refrigerator oil composition according to claim 1, wherein the epoxidized vegetable oil is an epoxidized soybean oil, linseed oil or cottonseed oil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |