US3879305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease thickened with oxygen-linked or sulfur-linked polyureas
Assignee: Mobil Oil AS
•
Filing: 1973-03-26
•
Granted: 1975-04-22
•
Expires: 1993-03-26
Abstract
Abstract Improved greases, having wide-temperature utility and good oxidation stability are provided comprising an oil of lubricating viscosity, as a vehicle, and a thickening quantity of a polyurea prepared by reacting a monoamine, a diisocyanate and a diamine having one amino group attached to each of two hydrocarbyl groups and the hydrocarbyl groups being separated by an oxygen or sulfur atom.
Inventors
- 👤 Melville Ehrlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:15
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3225; C08G18/2805; C08G18/285; C08G18/2865; C08G18/38; C08G18/3855; C08G18/3863; C08G18/3865; C08G18/3868; C10; C10M; C10M119/00; C10M119/24; C10M119/26; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/065; C10M2201/066; C10M2201/10; C10M2201/105; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/028; C10M2207/00; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2211/00; C10M2211/02; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/10; C10M2215/102; C10M2219/00; C10M2219/06; C10M2219/062; C10M2219/064; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10M2227/04; C10M2227/08; C10M2227/081; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10M2229/051; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
A GREASE COMPOSITION COMPRISING AN OIL OF LUBRICATING VISCOSITY, AS A VEHICLE, AND A THICKENING AMOUNT OF A POLUREA, SAID POLYUREA HAVING BEEN PREPARED BY REACTING STOICHIOMETRICALLY AT A TEMMPERATURE OF FROM ABOUT 45* TO ABOUT 250*F A MONOAMINE, ADIISOCYANATE AND A DIAMINE HAVING ONE AMINO GROUP ATTACHED TO EACH OF TWO HYDROCARBYL GROUPS AND SAID HYDROCARBYL GROUPS BEING SEPARATED BY AN OXYGEN OR SULFUR ATOM.
Claim 2
Dependent Claim
66 words
A GREASE COMPOSITION COMPRISING AN OIL OF LUBRICATING VISCOSITY, AS A VEHICLE, AND A THICKENING AMOUNT OF A POLUREA, SAID POLYUREA HAVING BEEN PREPARED BY REACTING STOICHIOMETRICALLY AT A TEMMPERATURE OF FROM ABOUT 45* TO ABOUT 250*F A MONOAMINE, ADIISOCYANATE AND A DIAMINE HAVING ONE AMINO GROUP ATTACHED TO EACH OF TWO HYDROCARBYL GROUPS AND SAID HYDROCARBYL GROUPS BEING SEPARATED BY AN OXYGEN OR SULFUR ATOM.
Claim 3
Dependent Claim
67 words
A grease composition comprising an oil of lubricating viscosity, as a vehicle, and a thickening amount of a polyurea, said polyurea having been prepared by reacting stoichiometrically at a temperature of from about 45* to about 250*F a monoamine, a diisocyanate and a diamine having one amino group attached to each of twO hydrocarbyl groups and said hydrocarbyl groups being separated by an oxygen or sulfur atom.
Claim 4
Dependent Claim
67 words
A grease composition comprising an oil of lubricating viscosity, as a vehicle, and a thickening amount of a polyurea, said polyurea having been prepared by reacting stoichiometrically at a temperature of from about 45* to about 250*F a monoamine, a diisocyanate and a diamine having one amino group attached to each of twO hydrocarbyl groups and said hydrocarbyl groups being separated by an oxygen or sulfur atom.
Claim 5
Dependent Claim
24 words
A grease composition as defined by claim 1 wherein said thickener is present in an amount from about 1 to about 40%, by weight.
Claim 6
Dependent Claim
24 words
A grease composition as defined by claim 1 wherein said thickener is present in an amount from about 2 to about 20%, by weight.
Claim 7
Dependent Claim
14 words
A grease composition as defined by claim 1 wherein said monoamine is octadecenyl amine.
Claim 8
Dependent Claim
15 words
A grease composition as defined by claim 1 wherein said monoamine is phenyl alpha naphthylamine.
Claim 9
Dependent Claim
14 words
A grease composition as defined by claim 1 wherein said diisocyanate is toluene diisocyanate.
Claim 10
Dependent Claim
16 words
A grease composition as defined by claim 1 wherein said diamine is a diamino diphenyl ether.
Claim 11
Dependent Claim
16 words
A grease composition as defined by claim 1 wherein said diamine is a diamino diphenyl sulfide.
Claim 12
Dependent Claim
18 words
A grease composition as defined by claim 1 wherein said diamine is 4, 4'' - diamino diphenyl ether.
Claim 13
Dependent Claim
18 words
A grease composition as defined by claim 1 wherein said diamine is 4, 4'' - diamino diphenyl sulfide.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |