US4497721A
Expired / Lapsed
US
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Refrigerator oil composition
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1983-11-07
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Granted: 1985-02-05
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Expires: 2003-11-07
Abstract
Abstract A refrigerator oil composition is described, comprising: (1) at least one of mineral oil and synthetic oil and (2) at least one of (a) 15-crown-5, (b) a derivative of 15-crown-5, and (c) a glycidyl compound represented by the general formula: <IMAGE> (wherein R is hydrogen or an alkyl group containing from 1 to 5 carbon atoms). This composition exhibits high stability when in contact with halogen-containing refrigerants and is limited in the formation of hydrogen chloride, for example, resulting from its reaction with the halogen-containing refrigerants. Thus the refrigerator oil composition of the invention is useful as a lubricant for refrigerators.
Inventors
- 👤 Takao Katayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:17
CPC Classifications
C; C10; C10M; C10M129/00; C10M129/02; C10M129/68; C10M129/76; C10M129/16; C10M129/20; C10M171/00; C10M171/008; C10M2207/00; C10M2207/04; C10M2207/044; C10M2207/28; C10M2207/287; C10M2207/288; C10M2207/289; 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: 6
Claim 1
Independent Claim
55 words
A refrigerator oil composition comprising: (1) mineral oil, synthetic oil or a mixture thereof; and (2) (a) 15-crown-5, (b) a derivative of 15-crown-5, (c) a glycidyl compound represented by the general formula: ##STR8## (wherein R is a hydrogen atom or an alkyl group containing from 1 to 5 carbon atoms), or (d) a mixture thereof.
Claim 2
Dependent Claim
55 words
A refrigerator oil composition comprising: (1) mineral oil, synthetic oil or a mixture thereof; and (2) (a) 15-crown-5, (b) a derivative of 15-crown-5, (c) a glycidyl compound represented by the general formula: ##STR8## (wherein R is a hydrogen atom or an alkyl group containing from 1 to 5 carbon atoms), or (d) a mixture thereof.
Claim 3
Dependent Claim
30 words
The composition as claimed in claim 1, wherein the amount of Component (2) added is from 0.001 to 10 parts by weight per 100 parts by weight of Component (1).
Claim 4
Dependent Claim
25 words
The composition as claimed in claim 1, wherein component (2) is a derivative of 15-crown-5 selected from the group consisting of benzo-15-crown-5, cyclohexyl-15-crown-5 and tert-butylbenzo-15-crown-5.
Claim 5
Dependent Claim
37 words
The composition as claimed in claim 1, wherein component (2) is a glycidyl compound selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, glycidyl ethylacrylate, glycidyl propylacrylate, glycidyl isopropylacrylate, glycidyl butylacrylate, glycidyl sec-butylacrylate, and glycidyl tert-butylacrylate.
Claim 6
Dependent Claim
24 words
The composition as claimed in claim 1, wherein the viscosity of Component (1) as determined at 100° C. is from 1 to 50 centistokes.
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) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |