US5368765A
Expired / Lapsed
US
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Lubricating oil and compositions for the hydrogen-containing Flon refrigerants
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1989-12-21
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Granted: 1994-11-29
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Expires: 2009-12-21
Abstract
Abstract A lubricating oil for hydrogen-containing Flon refrigerants, comprising as a main component a high-viscosity alkylbenzene having a kinematic viscosity at 40 DEG C. of 50 cSt or higher. Lubricating oil composition for hydrogen-containing Flon refrigerants, comprising as the main components the abovementioned high-viscosity alkylbenzene and (B) a mineral oil having a kinematic viscosity at 40 DEG C. of 50 cSt or higher, a pour point of -15 DEG C. or lower and a nitrogen content of 100 ppm or lower or (C) polyglycol having a kinematic viscosity at 40 DEG C. of 50 cSt or higher and a viscosity index of 150 or more. Furthermore, the above-mentioned high-viscosity alkylbenzene, the mineral oil and polyglycol can be used combinedly. In that combination use, mineral oils and polyglycols having kinematic viscosity at 40 DEG C. of lower than 50 cSt can also be used. The lubricating oil and lubricating oil compositions of the present invention are suitable lubricants for refrigerators, coolers, heat pumps and so forth using hydrogen-containing Flon compounds as refrigerants.
Inventors
- 👤 Masato Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:43
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C10M7/00; C10M101/00; C10M101/02; C10M105/00; C10M105/02; C10M105/06; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M127/00; C10M127/04; C10M159/00; C10M159/02; C10M159/04; C10M169/00; C10M169/04; C10M169/045; C10M171/00; C10M171/008; C10M2203/00; C10M2203/06; C10M2203/065; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; 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; 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: 10
Claim 1
Independent Claim
99 words
A lubricating oil composition for refrigerants comprising 1,1-dichloro-2,2,2-trifluoroethane; 1,1,1,2-tetrafluoroethane; 1-chloro-1,1-difluoroethane; 1,1-difluoroethane; trifluoromethane or monochlorodifluoromethane, comprising as the main components (A) high-viscosity alkylbenzenes with a kinematic viscosity at 40° C. of at least 50 cSt comprising at least 70% by weight of dialkylbenzenes containing at least 20 carbon atoms in the alkyl groups and (C) a polyoxypropylene glycol monobutyl ether having a kinematic viscosity at 40° C. of 50 cSt or higher, and a viscosity index of 50 or higher; a ratio of (A)/(C) being 97 to 3% by weight of (A) and 3 to 97% by weight of (C).
Claim 2
Dependent Claim
99 words
A lubricating oil composition for refrigerants comprising 1,1-dichloro-2,2,2-trifluoroethane; 1,1,1,2-tetrafluoroethane; 1-chloro-1,1-difluoroethane; 1,1-difluoroethane; trifluoromethane or monochlorodifluoromethane, comprising as the main components (A) high-viscosity alkylbenzenes with a kinematic viscosity at 40° C. of at least 50 cSt comprising at least 70% by weight of dialkylbenzenes containing at least 20 carbon atoms in the alkyl groups and (C) a polyoxypropylene glycol monobutyl ether having a kinematic viscosity at 40° C. of 50 cSt or higher, and a viscosity index of 50 or higher; a ratio of (A)/(C) being 97 to 3% by weight of (A) and 3 to 97% by weight of (C).
Claim 3
Dependent Claim
29 words
A lubricating oil composition as defined in claim 1, wherein the kinematic viscosity at 40° C. of (A) high-viscosity alkylbenzene is in the range of 60 to 300 cSt.
Claim 4
Dependent Claim
36 words
A lubricating oil composition as defined in claim 1, wherein the alkylbenzenes further contain not more than 30% by weight of alkylbenzenes having a carbon content in the alkyl group not greater than 19 carbon atoms.
Claim 5
Dependent Claim
133 words
A lubricating oil composition for refrigerants comprising 1,1-dichloro-2,2,2-trifluoroethane; 1,1,1,2-tetrafluoroethane; 1-chloro-1,1-difluoroethane; 1,1-difluoroethane; trifluoromethane or monochlorodifluoromethane, comprising as the main components (A) high-viscosity alkylbenzenes with a kinematic viscosity at 40° C. of at least 50 cSt comprising at least 70% by weight of dialkylbenzenes containing at least 20 carbon atoms in the alkyl groups and (B') a mineral oil having a kinematic viscosity at 40° C. of at least 50 cSt, a pour point of -15° C. or lower and a nitrogen content of 100 ppm or less and (C') polyoxypropylene glycol monobutyl ether; the ratio of (A)/(B')/(C') being 2 to 20% by weight of (A), 2 to 15% by weight of (B') and 96 to 65% by weight of (C'); the (B') mineral oil having a sulfur content not higher than 1% by weight.
Claim 6
Dependent Claim
133 words
A lubricating oil composition for refrigerants comprising 1,1-dichloro-2,2,2-trifluoroethane; 1,1,1,2-tetrafluoroethane; 1-chloro-1,1-difluoroethane; 1,1-difluoroethane; trifluoromethane or monochlorodifluoromethane, comprising as the main components (A) high-viscosity alkylbenzenes with a kinematic viscosity at 40° C. of at least 50 cSt comprising at least 70% by weight of dialkylbenzenes containing at least 20 carbon atoms in the alkyl groups and (B') a mineral oil having a kinematic viscosity at 40° C. of at least 50 cSt, a pour point of -15° C. or lower and a nitrogen content of 100 ppm or less and (C') polyoxypropylene glycol monobutyl ether; the ratio of (A)/(B')/(C') being 2 to 20% by weight of (A), 2 to 15% by weight of (B') and 96 to 65% by weight of (C'); the (B') mineral oil having a sulfur content not higher than 1% by weight.
Claim 7
Dependent Claim
30 words
A lubricating oil composition as defined in claim 4, wherein the kinematic viscosity at 40° C. at (A) a high-viscosity alkylbenzene is in the range of 60 to 300 cSt.
Claim 8
Dependent Claim
29 words
A lubricating oil composition as defined in claim 4, wherein the kinematic viscosity at 40° C. of (B') mineral oil is in the range of 5 to 600 cSt.
Claim 9
Dependent Claim
27 words
A lubricating oil composition as defined in claim 4, herein the kinematic viscosity at 40° C. of (C') is in the range of 10 to 1000 cSt.
Claim 10
Dependent Claim
36 words
A lubricating oil composition as defined in claim 4, wherein the alkylbenzenes further contain not more than 30% by weight of alkylbenzenes having a carbon content in the alkyl group not greater than 19 carbon atoms.
References Cited (Backward Citations)
US3092981A
Cited
US3642634A
Cited
US3609085A
Cited
DE2362857A1
Cited
US4427561A
Cited
JPS58103594A
Cited
JPS60123577A
Cited
US5049292A
Cited
JPS636092A
Cited
US4983313A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |