Patent US4261845A successfully refreshed from Google Patents.
US4261845A
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Novel polyureas and their use as grease thickening agents
Assignee: Huntsman Corp
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Filing: 1980-01-18
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Granted: 1981-04-14
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Expires: 2000-01-18
Abstract
Abstract Novel polyureas of the formula: ##STR1## wherein n is 9 to 18, m is 2 to 10, X and Y are each either ethyl, methyl or a hydrogen atom and R=aromatic, aliphatic or cycloaliphatic, are described herein. These polyureas are particularly useful as thickening agents for lubricating oils to make greases. The polyureas may be prepared by reacting the aminated products of propoxylated fatty alcohols with organic polyisocyanates. The reaction is a simple process requiring no heat. Very low levels of the resulting polyureas are required to thicken oils of lubricating viscosity into greases which have good high temperature stability.
Inventors
- 👤 Michael Cuscurida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:52
CPC Classifications
C; C10; C10M; C10M119/00; C10M119/24; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/285; C08G18/2865; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/10; C10M2215/102; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
35 words
Polyureas of the formula: ##STR4## wherein n is 9 to 18, m is 2 to 10, X and Y are each either ethyl, methyl or a hydrogen atom and R is aromatic, aliphatic or cycloaliphatic.
Claim 2
Dependent Claim
35 words
Polyureas of the formula: ##STR4## wherein n is 9 to 18, m is 2 to 10, X and Y are each either ethyl, methyl or a hydrogen atom and R is aromatic, aliphatic or cycloaliphatic.
Claim 3
Dependent Claim
21 words
Polyureas of claim 1 in which n is 9 to 11, m is 2, X is hydrogen and Y is methyl.
Claim 4
Dependent Claim
32 words
A grease composition comprising an oil of lubricating viscosity, as a vehicle, and a thickening amount of a polyurea of claim 1 prepared by mixing an alkylpolyalkoxy monoamine with an organic polyisocyanate.
Claim 5
Dependent Claim
39 words
The grease composition of claim 3 wherein the alkylpolyalkoxy monoamine is of the formula: ##STR5## wherein n is 9 to 18, m is 2 to 10, and X or Y being methyl and the other being a hydrogen atom.
Claim 6
Dependent Claim
22 words
The grease composition of claim 3 wherein the organic polyisocyanate is of the formula: R--N═C═O).sub.2 wherein R is aromatic, aliphatic or cycloaliphatic.
Claim 7
Dependent Claim
20 words
The grease composition of claim 3 wherein the mixing of the monoamine and the polyisocyanate is conducted at ambient temperatures.
Claim 8
Dependent Claim
26 words
The grease composition of claim 4 wherein the monoamine n is 9 to 11, m is 2, X is a hydrogen atom and Y is methyl.
Claim 9
Dependent Claim
14 words
The grease composition of claim 5 wherein for the organic polyisocyanate R is aliphatic.
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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) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |