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US4115284A
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Brake grease compositions
Assignee: Eneos Corp
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Filing: 1977-06-17
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Granted: 1978-09-19
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Expires: 1997-06-17
Abstract
Abstract Grease compositions comprising (A) a specific polyoxypropylene glycol monoether as the lubricating base oil and (B) a specific gelling agent as the thickening agent, consisting of at least one diurea compound represented by the formula <IMAGE> wherein R1 is a divalent aromatic hydrocarbon radical, and R2 and R3 a cyclohexyl group, a cyclohexyl derivative group having 7-12 carbon atoms, or an alkyl group having 8-20 carbon atoms.
Inventors
- 👤 Hirotugu Kinoshita
- 👤 Makoto Sekiya
- 👤 Nobuo Makino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:19
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/02; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/062; C10M2201/065; C10M2201/066; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; 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; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/006; C10M2215/02; C10M2215/026; C10M2215/08; C10M2215/0813; C10M2215/10; C10M2215/1013; C10M2215/102; C10M2215/1026; C10M2215/12; C10M2215/121; C10M2215/22; C10M2215/2206; C10M2215/225; C10M2215/227; C10M2215/2275; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A brake grease composition comprising: (A) a polyoxypropylene glycol monoether as the lubricating base oil, having a pour point of not higher than -20° C., a flash point not lower than 200° C. and a viscosity of not lower than 8 cSt at 98.9° C. and (B) a gelling agent as the thickening agent, consisting of at least one diurea compound represented by the general formula ##STR7## wherein R 1 is a divalent aromatic hydrocarbon radical, and R 2 and R 3 are each of cyclohexyl, a cyclohexyl derivative group having 7-12 carbon atoms or an alkyl group having 8-20 carbon atoms; and wherein the gelling agent has a cyclohexyl or cyclohexyl derivative group content of at least 20% as calculated from the formula ##EQU3##
Claim 2
Dependent Claim
125 words
A brake grease composition comprising: (A) a polyoxypropylene glycol monoether as the lubricating base oil, having a pour point of not higher than -20° C., a flash point not lower than 200° C. and a viscosity of not lower than 8 cSt at 98.9° C. and (B) a gelling agent as the thickening agent, consisting of at least one diurea compound represented by the general formula ##STR7## wherein R 1 is a divalent aromatic hydrocarbon radical, and R 2 and R 3 are each of cyclohexyl, a cyclohexyl derivative group having 7-12 carbon atoms or an alkyl group having 8-20 carbon atoms; and wherein the gelling agent has a cyclohexyl or cyclohexyl derivative group content of at least 20% as calculated from the formula ##EQU3##
Claim 3
Dependent Claim
27 words
A brake grease composition according to claim 1, wherein the gelling agent is contained in an amount of 2 - 25% by weight of the grease composition.
Claim 4
Dependent Claim
31 words
A brake grease composition according to claim 1, further comprising at least one additive selected from the group consisting of an antioxidant, anti-wear agent, tackiness improver, anti-rust agent and metal deactivator.
Claim 5
Dependent Claim
28 words
A brake grease composition according to claim 1, further comprising at least one solid lubricant selected from the group consisting of molybdenum disulfide, graphite, zinc oxide and polytetrafluoroethylenes.
Claim 6
Dependent Claim
28 words
A brake grease composition according to claim 2, further comprising at least one solid lubricant selected from the group consisting of molybdenum disulfide, graphite, zinc oxide and polytetrafluoroethylenes.
Claim 7
Dependent Claim
79 words
A brake grease composition according to claim 1, wherein the divalent aromatic hydrocarbon radical is a member selected from the group consisting of ##STR8## the cyclohexyl derivative group is a member selected from the group consisting of methylcyclohexyl, dimethylcyclohexyl, ethylcyclohexyl, diethylcyclohexyl, propylcyclohexyl, isopropylcyclohexyl, 1-methyl-3-propylcyclohexyl, butylcyclohexyl, amylcyclohexyl, amyl-methylcyclohexyl and hexylcyclohexyl groups, and the alkyl group is a member selected from the group consisting of octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, octadecenyl, nonadecyl and eicodecyl groups.
Claim 8
Dependent Claim
79 words
A brake grease composition according to claim 5, wherein the divalent aromatic hydrocarbon radical is a member selected from the group consisting of ##STR9## the cyclohexyl derivative group is a member selected from the group consisting of methylcyclohexyl, dimethylcyclohexyl, ethylcyclohexyl, diethylcyclohexyl, propylcyclohexyl, isopropylcyclohexyl, 1-methyl-3-propylcyclohexyl, butylcyclohexyl, amylcyclohexyl, amyl-methylcyclohexyl and hexylcyclohexyl groups, and the alkyl group is a member selected from the group consisting of octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, octadecenyl, nonadecyl and eicodecyl groups.
References Cited (Backward Citations)
US2710841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |