US4485044A
Expired / Lapsed
US
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Sulfurized esters of polycarboxylic acids
Assignee: Vibrantz Corp
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Filing: 1982-02-24
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Granted: 1984-11-27
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Expires: 2002-02-24
Abstract
Abstract Improved additive compositions comprise sulfurized, esterified, unsaturated polycarboxylic acids. Such additive compositions possess good solubility in oils and impart improved lubrication and anti-oxidant properties to lubricant, fuel, and metal-working compositions.
Inventors
- 👤 Karl P. Kammann, Jr.
- 👤 Paul F. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:04
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C10M135/06; C07; C07C; C07C323/00; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2493; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10N; C10N2040/00; C10N2040/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
An additive composition, comprising one or more sulfurized esters of an unsaturated dibasic carboxylic acid, wherein: (a) the unsaturated dibasic carboxylic acid moiety of the unsaturated esters comprises the addition product of linoleic acid and acrylic acid; (b) the alcohol moiety of the unsaturated esters comprises a monohydric alcohol having from about 8 to about 22 carbon atoms per molecule; and (c) the sulfur moiety comprises bound sulfur, present in an amount from about 2.0 wt. % to about 8.0 wt. %, based on the sulfurized ester product, introduced into the unsaturated ester by heating with elemental sulfur at a temperature within the range from about 300° F. to about 400° F.
Claim 2
Dependent Claim
112 words
An additive composition, comprising one or more sulfurized esters of an unsaturated dibasic carboxylic acid, wherein: (a) the unsaturated dibasic carboxylic acid moiety of the unsaturated esters comprises the addition product of linoleic acid and acrylic acid; (b) the alcohol moiety of the unsaturated esters comprises a monohydric alcohol having from about 8 to about 22 carbon atoms per molecule; and (c) the sulfur moiety comprises bound sulfur, present in an amount from about 2.0 wt. % to about 8.0 wt. %, based on the sulfurized ester product, introduced into the unsaturated ester by heating with elemental sulfur at a temperature within the range from about 300° F. to about 400° F.
Claim 3
Dependent Claim
13 words
The additive composition of claim 1 wherein the monohydric alcohol is isodecyl alcohol.
Claim 4
Dependent Claim
12 words
The additive composition of claim 1 wherein the monohydric alcohol is dodecanol.
Claim 5
Dependent Claim
36 words
The additive composition of claim 1 wherein the sulfurization is effected by heating the unsaturated ester with elemental sulfur for from about 1 to about 8 hours, followed by blowing with air to remove hydrogen sulfide.
Claim 6
Dependent Claim
36 words
The additive composition of claim 1 wherein the sulfurization of the unsaturated esters is effected in the presence of an added solubilizing component selected from the class consisting of natural triglycerides, esters, olefins, and blends thereof.
References Cited (Backward Citations)
US2137584A
Cited
US2373015A
Cited
US2372641A
Cited
US2384443A
Cited
US2371207A
Cited
US2415838A
Cited
US2372366A
Cited
US2628939A
Cited
US2605193A
Cited
US2800500A
Cited
US4152278A
Cited
US4380499A
Cited
US4380498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |