US4431557A
Expired / Lapsed
US
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Refrigerator oil composition(s)
Assignee: Eneos Corp
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Filing: 1981-12-21
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Granted: 1984-02-14
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Expires: 2001-12-21
Abstract
Abstract A fluid composition comprised of a fluorocarbon refrigerant, a hydrocarbon oil, and an alkylene oxide additive compound represented by the general formula (I): <IMAGE> (I) wherein R is hydrogen or a lower alkyl group and R' is an alkyl group, wherein R and R' contain 6 or more carbon atoms. The additive improves the thermal resistance of the oil in the presence of the refrigerant.
Inventors
- 👤 Isao Shimizu
- 👤 Yasuo Kondo
- 👤 Koji Beppu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:17
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10; C10M; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C10M131/00; C10M131/02; C10M131/04; C10M141/00; C10M141/04; C10M171/00; C10M171/008; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/122; C10M2207/00; C10M2207/04; C10M2207/042; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
21 words
A refrigerator oil composition, comprising: at least one oil selected from the group consisting of mineral oils and synthetic oils; and
Claim 2
Dependent Claim
21 words
A refrigerator oil composition, comprising: at least one oil selected from the group consisting of mineral oils and synthetic oils; and
Claim 3
Dependent Claim
37 words
an alkylene oxide additive compound represented by the general formula (I): ##STR3## wherein R is hydrogen or a lower alkyl group, and R' is an alkyl group, wherein R and R' contain 6 or more carbon atoms.
Claim 4
Dependent Claim
37 words
an alkylene oxide additive compound represented by the general formula (I): ##STR3## wherein R is hydrogen or a lower alkyl group, and R' is an alkyl group, wherein R and R' contain 6 or more carbon atoms.
Claim 5
Dependent Claim
32 words
A refrigerator oil composition as claimed in claim 1, wherein said alkylene oxide additive is contained in an amount of 0.01 to 10% by weight based on the weight of said oil.
Claim 6
Dependent Claim
16 words
A refrigerator oil composition as claimed in claim 1, wherein said oil contains additional conventional additives.
Claim 7
Dependent Claim
28 words
A refrigerator oil composition as claimed in claim 1, wherein said alkylene oxide additive compound is an α-olefin oxide containing from 8 carbon atoms to 18 carbon atoms.
Claim 8
Dependent Claim
32 words
A refrigerator oil composition as claimed in claim 4, wherein said α-olefin oxide compound is contained in an amount of 0.5% to 3% by weight based on the weight of said oil.
Claim 9
Dependent Claim
62 words
A fluid composition, comprising: a fluorocarbon refrigerant; at least one oil selected from the group consisting of a mineral oil and a synthetic oil; and an alkylene oxide additive compound represented by the general formula (I): ##STR4## wherein R is hydrogen or a lower alkyl group and R' is an alkyl group, wherein R and R' contain 6 or more carbon atoms.
Claim 10
Dependent Claim
62 words
A fluid composition, comprising: a fluorocarbon refrigerant; at least one oil selected from the group consisting of a mineral oil and a synthetic oil; and an alkylene oxide additive compound represented by the general formula (I): ##STR4## wherein R is hydrogen or a lower alkyl group and R' is an alkyl group, wherein R and R' contain 6 or more carbon atoms.
Claim 11
Dependent Claim
48 words
A fluid composition as claimed in claim 6, wherein said alkylene oxide compound is an α-olefin oxide containing from 8 carbon atoms to 18 carbon atoms and is contained within said oil in an amount of 0.01% to 10% by weight based on the weight of said oil.
Claim 12
Dependent Claim
31 words
A fluid composition as claimed in claim 7, wherein said α-olefin oxide additive is contained in an amount of 0.5% to 3% by weight based on the weight of said oil.
Claim 13
Dependent Claim
28 words
A fluid composition as claimed in claim 8, wherein said fluorocarbon refrigerant is selected from the group consisting of trichloromonofluoromethane, dichlorodifluoromethane, monochlorotrifluorotrifluoromethane, dichloromonofluorethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, dichlorodifluoromethane+difluoroethane and monochlorodifluoromethane+monochloropentafluoroethane.
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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |