US3920571A
Expired / Lapsed
US
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Grease composition and method of preparing the same
Assignee: Chevron USA Inc
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Filing: 1974-09-16
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Granted: 1975-11-18
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Expires: 1994-09-16
Abstract
Abstract A novel grease composition is prepared by admixing a lubricating oil with 0.5 to 10 weight percent of a mono- or polyurea compound or mixture of mono- and/or polyurea compounds having from 1 to 8 ureido groups and having a molecular weight between about 375 to 2,500 and from 3 to 30 weight percent of an alkaline earth metal carbonate.
Inventors
- 👤 Richard E Crocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:39
CPC Classifications
C; C10; C10M; C10M123/00; C10M123/04; C10M169/00; C10M169/02; C10M2201/00; C10M2201/06; C10M2201/062; C10M2201/08; C10M2201/082; C10M2201/083; C10M2203/00; C10M2203/06; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/101; C10M2209/103; C10M2209/105; C10M2209/108; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/08; C10M2215/082; C10M2215/10; C10M2215/102; C10M2215/12; C10M2215/24; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/044; C10M2217/045; C10M2217/06; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2227/00; C10M2227/02; C10M2227/04; C10M2229/00; C10M2229/04; C10M2229/042; C10M2229/043; C10M2229/044; C10N; C10N2010/00; C10N2010/04; C10N2010/08; C10N2030/00; C10N2030/12; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
70 words
A GREASE COMPOSITION COMPRISING A MAJOR PART OF LUBRICATING OIL CONTAINING (1) FROM 0.5 TO 10 WEIGTH PERCENT OF A THICKENER SELECTED FROM MONO- OR POLYUREA COMPOUNDS OR A MIXTURE OF MONO- OR POLYUREA COMPOUNDS HAVING AN AVERAGE FROM 1 TO 8 UREIDO GROUPS AND HAVING A NUMBER AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 375 AND 2,500; AND (2) FROM 3 TO 30 WEIGHT PERCENT OF AN ALKALINE EARTH METAL CARBONATE.
Claim 2
Dependent Claim
70 words
A GREASE COMPOSITION COMPRISING A MAJOR PART OF LUBRICATING OIL CONTAINING (1) FROM 0.5 TO 10 WEIGTH PERCENT OF A THICKENER SELECTED FROM MONO- OR POLYUREA COMPOUNDS OR A MIXTURE OF MONO- OR POLYUREA COMPOUNDS HAVING AN AVERAGE FROM 1 TO 8 UREIDO GROUPS AND HAVING A NUMBER AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 375 AND 2,500; AND (2) FROM 3 TO 30 WEIGHT PERCENT OF AN ALKALINE EARTH METAL CARBONATE.
Claim 3
Dependent Claim
15 words
The composition defined in claim 1, wherein said alkaline earth metal carbonate is calcium carbonate.
Claim 4
Dependent Claim
49 words
The composition defined in claim 2, wherein said mono- or polyurea compound or mixture of mono- and/or polyurea compounds has an average of 3 to 4 ureido groups and has a number average molecular weight between about 600 and 1,200, and wherein said lubricating oil is a hydrocarbon oil.
Claim 5
Dependent Claim
77 words
A grease composition comprising a major portion of an oil of lubricating viscosity, from 3 to 30 weight percent of an alkaline earth metal carbonate and a mono- or polyurea compound or mixture of mono- and/or polyurea compounds prepared by reacting the following components: I. a diisocyanate having the formula OCN-R-NCO, wherein R is a hydrocarbylene having from 2 to 30 carbons; II. a polyamine having a total of 2 to 40 carbons and having the formula:
Claim 6
Dependent Claim
77 words
A grease composition comprising a major portion of an oil of lubricating viscosity, from 3 to 30 weight percent of an alkaline earth metal carbonate and a mono- or polyurea compound or mixture of mono- and/or polyurea compounds prepared by reacting the following components: I. a diisocyanate having the formula OCN-R-NCO, wherein R is a hydrocarbylene having from 2 to 30 carbons; II. a polyamine having a total of 2 to 40 carbons and having the formula:
Claim 7
Dependent Claim
25 words
The composition defined in claim 4 wherein said diisocyanate is tolylene diisocyanate, said polyamine is ethylene diamine and said monofunctional compound is a C12-C24 monoamine.
Claim 8
Dependent Claim
18 words
The composition defined in claim 5 wherein the molar ratio of diisocyanate to diamine to monoamine is 2:1:2.
Claim 9
Dependent Claim
14 words
The composition defined in claim 6 wherein said monoamine is tall oil fatty amine.
Claim 10
Dependent Claim
12 words
The composition defined in claim 4 wherein said polyamine is a triamine.
Claim 11
Dependent Claim
12 words
The composition defined in claim 8 wherein said triamine is tert-N-methyl diethylenetriamine.
Claim 12
Dependent Claim
11 words
The composition defined in claim 4 wherein said polyamine is piperazine.
Claim 13
Dependent Claim
15 words
The composition defined in claim 4 wherein said alkaline earth metal carbonate is calcium carbonaate.
Claim 14
Dependent Claim
23 words
The composition defined in claim 11 wherein said oil of lubricating viscosity is a naphthenic or paraffinic hydrocarbon lubricating oil or mixture thereof.
Claim 15
Dependent Claim
14 words
The composition defined in claim 12 wherein an alkali metal nitrite is also present.
Claim 16
Dependent Claim
14 words
The composition defined in claim 13 wherein said alkali metal nitrite is sodium nitrite.
Claim 17
Dependent Claim
15 words
The composition defined in claim 14, wherein said alkaline earth metal carbonate is calcium carbonate.
Claim 18
Dependent Claim
12 words
The composition defined in claim 15 wherein said monoamine is oleyl amine.
Claim 19
Independent Claim
110 words
A method for preparing a grease composition which comprises: I. admixing a C4 to C32 diisocyanate, a C2 to C40 polyamine and a C1 to C30 monoamine within a major portion of a lubricating oil, the molar ratio of diisocyanate to polyamine to monoamine being 1:0-2:0.1-2; II. maintaining said admixture at a temperature of 60* to 320*F. for a period of 0.5 to 10 hours; III. thereafter adding an alkaline earth metal hydroxide or oxide to said admixture; IV. contacting said admixture with 0.1 to 10 molar parts of carbon dioxide per molar part of alkaline earth metal base; and (V) thereafter milling said admixture to the consistency of grease.
Claim 20
Independent Claim
110 words
A method for preparing a grease composition which comprises: I. admixing a C4 to C32 diisocyanate, a C2 to C40 polyamine and a C1 to C30 monoamine within a major portion of a lubricating oil, the molar ratio of diisocyanate to polyamine to monoamine being 1:0-2:0.1-2; II. maintaining said admixture at a temperature of 60* to 320*F. for a period of 0.5 to 10 hours; III. thereafter adding an alkaline earth metal hydroxide or oxide to said admixture; IV. contacting said admixture with 0.1 to 10 molar parts of carbon dioxide per molar part of alkaline earth metal base; and (V) thereafter milling said admixture to the consistency of grease.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |