US3720615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-soluble rust preventive composition
Assignee: Kao Corp
•
Filing: 1970-08-06
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Granted: 1973-03-13
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Expires: 1990-08-06
Abstract
Abstract An oil-soluble rust preventive composition consists essentially of (A) a polycarboxylic acid having seven to 44 carbon atoms and 2 or 3 carboxyl groups or a partial ester of said acid with analiphatic alcohol having one to 18 carbon atoms and (B) an aliphatic tertiary amine having three hydrocarbon groups, each of which has at least one to 20 carbon atoms and at least one of which has six to 20 carbon atoms. The weight ratio of (A) to (B) is in the range of 95:5 to 5:95. The composition, when added to hydrocarbon oil, provides improved rust preventive characteristics and improved demulsibility, particularly when the oil contains a dispersant of the metal salt type.
Inventors
- 👤 K Izumi
- 👤 T Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:51
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/288; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/06; C10M2223/063; C10M2223/065; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
An oil composition consisting essentially of a hydrocarbon lubricating oil or fuel oil containing from about 0.001 to 3 percent by weight of an oil-soluble rust preventive composition consisting essentially of A. material selected from the group consisting of (1) alkenyl succinic acids having three to 32 carbon atoms in the alkenyl substituent, (2) unsaturated monoenoic, dienoic or trienoic fatty acid-maleic anhydride addition products having 16 to 22 carbon atoms and their lower alkanol esters, (3) dimers of polyunsaturated dienoic and trienoic fatty acids having six to 22 carbon atoms, and B. an aliphatic tertiary amine having three hydrocarbon groups, each of which has from one to 20 carbon atoms and at least one of which has six to 20 carbon atoms, the weight ratio of (A) to (B) being in the range of 95:5 to 5: 95 and C. an alkaline earth metal alkyl benzene sulfonate as a dispersant, and the balance of the composition is a hydrocarbon lubricating or fuel oil, said dispersant being present in an amount less than about 15 percent by weight of said oil composition.
Claim 2
Dependent Claim
181 words
An oil composition consisting essentially of a hydrocarbon lubricating oil or fuel oil containing from about 0.001 to 3 percent by weight of an oil-soluble rust preventive composition consisting essentially of A. material selected from the group consisting of (1) alkenyl succinic acids having three to 32 carbon atoms in the alkenyl substituent, (2) unsaturated monoenoic, dienoic or trienoic fatty acid-maleic anhydride addition products having 16 to 22 carbon atoms and their lower alkanol esters, (3) dimers of polyunsaturated dienoic and trienoic fatty acids having six to 22 carbon atoms, and B. an aliphatic tertiary amine having three hydrocarbon groups, each of which has from one to 20 carbon atoms and at least one of which has six to 20 carbon atoms, the weight ratio of (A) to (B) being in the range of 95:5 to 5: 95 and C. an alkaline earth metal alkyl benzene sulfonate as a dispersant, and the balance of the composition is a hydrocarbon lubricating or fuel oil, said dispersant being present in an amount less than about 15 percent by weight of said oil composition.
Claim 3
Dependent Claim
30 words
The oil composition according to claim 1, in which said material is the addition product of maleic anhydride and a monoenoic fatty carboxylic acid having 16 to 22 carbon atoms.
Claim 4
Dependent Claim
19 words
The oil composition according to claim 1, in which said material is diisobutylene succinic acid or tetraisopropylene succinic acid.
Claim 5
Dependent Claim
78 words
An oil soluble rust preventive composition having good demulsibility, consisting essentially of A. the addition product of maleic anhydride and a monoenoic fatty carboxylic acid having 16 to 22 carbon atoms, and B. an aliphatic tertiary amine having three hydrocarbon groups each of which has frOm one to 20 carbon atoms and at least one of which has six to 20 carbon atoms, the weight ratio of (A) to (B) being in the range of 95:5 to 5:95.
Claim 6
Dependent Claim
78 words
An oil soluble rust preventive composition having good demulsibility, consisting essentially of A. the addition product of maleic anhydride and a monoenoic fatty carboxylic acid having 16 to 22 carbon atoms, and B. an aliphatic tertiary amine having three hydrocarbon groups each of which has frOm one to 20 carbon atoms and at least one of which has six to 20 carbon atoms, the weight ratio of (A) to (B) being in the range of 95:5 to 5:95.
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |