US3929651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified lithium soap grease
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1974-09-25
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Granted: 1975-12-30
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Expires: 1994-09-25
Abstract
Abstract A grease composition that combines good water resistance, good mechanical stability and high oil retention with excellent oxidation stability and high dropping point is prepared by the use of a novel thickener system whose essential components include a combination of dilithium salt of a C4-C12 dicarboxylic acid, e.g. dilithium azelate; a lithium soap of a 9-, 10-, or 12hydroxy C12 to C24 fatty acid, e.g. lithium 12-hydroxy-stearate; and a lithium salt formed in situ in the grease from a second hydroxy carboxylic acid wherein the OH group is attached to a carbon atom not more than 6 carbon atoms removed from the carboxyl group, and wherein either of those groups may be attached to either aliphatic or aromatic portions of a molecule. If desired, sufficient lithium hydroxide can be added to form the dilithium salt of the latter acid through reaction of its hydroxyl group.
Inventors
- 👤 Donald W Murray
- 👤 Warren C Pattenden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
C; C10; C10M; C10M117/00; C10M117/02; C10M123/00; C10M123/02; C10M2201/00; C10M2201/087; C10M2203/00; C10M2203/06; C10M2205/00; C10M2207/00; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/124; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/22; C10M2207/24; C10M2207/28; C10M2207/282; C10M2207/32; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/109; C10M2209/11; C10M2209/111; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/04; C10M2219/044; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/043; C10M2229/044; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
176 words
A LUBRICATING GREASE COMPOSITION OF HIGH DROPPING POINT AND LONG OXIDATION LIFE WHICH COMPRISES A MAJOR PROPORTION OF A LUBRICATING OIL AND FROM ABOUT 2 TO 30 WEIGHT % OF A THICKENER SYSTEM WHOSE ESSENTIAL COMPONENTS INCLUDE A DILITHIUM SALT OF A C4-C12 DICARBOXYLIC ACID, A LITHIUM SOAP OF A C12 TO C24 HYDROXY ACID, AND A LITHIUM SALT OF AHYDROXY AROMATIC CARBOXYLIC ACID HAVING A MAXIUM OF 14 CARBON ATOMS, WHEREIN THE HYDROXY GROUP IS ATTACHED TO A CARBON ATOM NOT MORE THAN 6 CARBON ATOMS REMOVED FROM THE CARBOXYL GROUP, IN A WEIGHT RATIO OF ABOUT 0.5 TO 15 PARTS OF HYDROXY FATTY ACID PER PART OF SAID DICARBOXYLIC ACID, AND IN A WEIGHT RATIO OF FROM ABOUT 0.025 TO 2.5 PARTS OF SAID HYDROXY AROMATIC CARBOXYLIC AICD PER PARTS OF DICARBOXYLIC AICD, SAID LITHIUM SALT OF HYDROXY AROMATIC CARBOXYLIC ACID HAVING BEEN PREPARED BY REACTING LITHIUM BASE WITH HYDROXY AROMATIC CARBOXYLIC ACID OR LOWER ALCOHOL ESTER THEREOF IN THE PRESENCE OF DILITHIUM SALT OF DICARBOXYLIC ACID AND LITHIUM SOAP OF HYDROXY FATTY ACID.
Claim 2
Dependent Claim
176 words
A LUBRICATING GREASE COMPOSITION OF HIGH DROPPING POINT AND LONG OXIDATION LIFE WHICH COMPRISES A MAJOR PROPORTION OF A LUBRICATING OIL AND FROM ABOUT 2 TO 30 WEIGHT % OF A THICKENER SYSTEM WHOSE ESSENTIAL COMPONENTS INCLUDE A DILITHIUM SALT OF A C4-C12 DICARBOXYLIC ACID, A LITHIUM SOAP OF A C12 TO C24 HYDROXY ACID, AND A LITHIUM SALT OF AHYDROXY AROMATIC CARBOXYLIC ACID HAVING A MAXIUM OF 14 CARBON ATOMS, WHEREIN THE HYDROXY GROUP IS ATTACHED TO A CARBON ATOM NOT MORE THAN 6 CARBON ATOMS REMOVED FROM THE CARBOXYL GROUP, IN A WEIGHT RATIO OF ABOUT 0.5 TO 15 PARTS OF HYDROXY FATTY ACID PER PART OF SAID DICARBOXYLIC ACID, AND IN A WEIGHT RATIO OF FROM ABOUT 0.025 TO 2.5 PARTS OF SAID HYDROXY AROMATIC CARBOXYLIC AICD PER PARTS OF DICARBOXYLIC AICD, SAID LITHIUM SALT OF HYDROXY AROMATIC CARBOXYLIC ACID HAVING BEEN PREPARED BY REACTING LITHIUM BASE WITH HYDROXY AROMATIC CARBOXYLIC ACID OR LOWER ALCOHOL ESTER THEREOF IN THE PRESENCE OF DILITHIUM SALT OF DICARBOXYLIC ACID AND LITHIUM SOAP OF HYDROXY FATTY ACID.
Claim 3
Dependent Claim
32 words
Composition as defined by claim 1 wherein the proportion of C12 to C24 hdyroxy fatty acid is from about 1.5 to 5 parts by weight per part by weight of dicarboxylic acid.
Claim 4
Dependent Claim
30 words
Composition as defined by claim 1 wherein the proportion of hydroxy, aromatic carboxylic acid is from about 0.125 to 1.25 parts by weight per part by weight of dicarboxylic acid.
Claim 5
Dependent Claim
16 words
Grease composition as definEd by claim 1 wherein said hydroxy aromatic carboxylic acid is salicylic acid.
Claim 6
Dependent Claim
17 words
Grease composition as defined by claim 1 wherein said hydroxy aromatic carboxylic acid is parahydroxy benzoic acid.
Claim 7
Dependent Claim
15 words
Grease composition as defined by claim 1 wherein said hydroxy fatty acid is 12-hydroxystearic acid.
Claim 8
Dependent Claim
14 words
Grease composition as defined by claim 1 wherein said dicarboxylic acid is azelaic acid.
Claim 9
Dependent Claim
14 words
Grease composition as defined by claim 1 wherein said dicarboxylic acid is sebacic acid.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |