US4983313A
Expired / Lapsed
US
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Refrigerating machine oil composition
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1990-03-28
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Granted: 1991-01-08
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Expires: 2010-03-28
Abstract
Abstract Disclosed is a refrigerating machine oil composition comprising: (A) 85 to 30% by weight of alkyl benzene having a kinematic viscosity at 40 DEG C. of 30 cSt or more; (B) 5 to 70% by weight of a paraffin-based mineral oil having a kinematic viscosity at 40 DEG C. of 20 to 500 cSt, a pour point of -35 DEG C. or lower, a viscosity index of 60 or more, and a sulfur content of 100 ppm or less; and (C) 1 to 30% by weight of a naphthene-based mineral oil having a kinematic viscosity at 40 DEG C. of 5 to 500 cSt, a pour point of -30 DEG C. or lower, and a sulfur content of 0.05 to 1% by weight, the total sulfur content of said composition being 0.01 to 0.10% by weight. The present composition is excellent in stability, lubricity, compatibility with refrigerants, and low temperature property.
Inventors
- 👤 Masato Kaneko
- 👤 Minoru Takagi
- 👤 Takashi Sunaga
- 👤 Takeo Komatsubara
- 👤 Taira Mutoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/02; C10M101/00; C10M101/02; C10M105/00; C10M105/02; C10M105/06; 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; 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
129 words
A refrigerating machine oil composition comprising: (A) 85 to 30% by weight of alkyl benzene having a kinematic viscosity at 40° C. of 30 cSt or more; (B) 5 to 70% by weight of a paraffin-based mineral oil having a kinematic viscosity at 40° C. of 20 to 500 cSt, a pour point of -35° C. or lower, a viscosity index of 60 or more, and a sulfur content of 100 ppm or less; and (C) 1 to 30% by weight of a naphthene-based mineral oil having a kinematic viscosity at 40° C. of 5 to 500 cSt, a pour point of -30° C. or lower, and a sulfur content of 0.05 to 1% by weight, the total sulfur content of said composition being 0.01 to 0.10% by weight.
Claim 2
Dependent Claim
129 words
A refrigerating machine oil composition comprising: (A) 85 to 30% by weight of alkyl benzene having a kinematic viscosity at 40° C. of 30 cSt or more; (B) 5 to 70% by weight of a paraffin-based mineral oil having a kinematic viscosity at 40° C. of 20 to 500 cSt, a pour point of -35° C. or lower, a viscosity index of 60 or more, and a sulfur content of 100 ppm or less; and (C) 1 to 30% by weight of a naphthene-based mineral oil having a kinematic viscosity at 40° C. of 5 to 500 cSt, a pour point of -30° C. or lower, and a sulfur content of 0.05 to 1% by weight, the total sulfur content of said composition being 0.01 to 0.10% by weight.
Claim 3
Dependent Claim
25 words
A refrigerating machine oil composition according to claim 1 wherein the alkyl benzene has a kinematic viscosity at 40° C. of 50 to 500 cSt.
Claim 4
Dependent Claim
25 words
A refrigerating machine oil composition according to claim 1 wherein the alkyl benzene has a kinematic viscosity at 40° C. of 70 to 400 cSt.
Claim 5
Dependent Claim
23 words
A refrigerating machine oil composition according to claim 1 wherein the paraffin-based mineral oil has a pour point of -40° C. or lower.
Claim 6
Dependent Claim
22 words
A refrigerating machine oil composition according to claim 1 wherein the paraffin-based mineral oil has a viscosity index of 70 or more.
Claim 7
Dependent Claim
23 words
A refrigerating machine oil composition according to claim 1 wherein the paraffin-based mineral oil has a sulfur content of 50 ppm or less.
Claim 8
Dependent Claim
38 words
A refrigerating machine oil composition according to claim 1 wherein the paraffin-based mineral oil has a pour point of -40° C. or lower, a viscosity index 70 or more, and a sulfur content of 50 ppm or less.
Claim 9
Dependent Claim
23 words
A refrigerating machine oil composition according to claim 1 wherein the naphthene-based mineral oil has a pour point of -40° C. or lower.
Claim 10
Dependent Claim
24 words
A refrigerating machine oil composition according to claim 1 wherein the naphthene-based mineral oil has a sulfur content of 0.1 to 0.6% by weight.
Claim 11
Dependent Claim
33 words
A refrigerating machine oil composition according to claim 1 wherein the naphthene-based mineral oil has a pour point of -40° C. or lower, and a sulfur content of 0.1 to 0.6% by weight.
Claim 12
Dependent Claim
40 words
A refrigerating machine oil composition according to claim 1, comprising 80 to 35% by weight of the alkyl benzene, 10 to 60% by weight of the paraffin-based mineral oil and 3 to 20% by weight of the naphthene-based mineral oil.
Claim 13
Dependent Claim
20 words
A refrigerating machine oil composition according to claim 1 wherein the total sulfur content is 0.02 to 0.06% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |