Patent US4036772A successfully refreshed from Google Patents.
US4036772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters made from the reaction product of low molecular weight ethylenically unsaturated acylating agents and oxidized ethylene-propylene interpolymers
Assignee: Lubrizol Corp
•
Filing: 1975-03-03
•
Granted: 1977-07-19
•
Expires: 1995-03-03
Abstract
Abstract Esters made from (A) high molecular weight carboxylic acid reagents derived from low molecular weight ethylenically unsaturated carboxylic acid reagents and oxidized ethylene-propylene interpolymers and (B) mono- or polyhydric alcohols are useful in lubricant compositions and normally liquid fuel compositions as viscosity improving agents and sludge dispersants. Esters wherein the low molecular weight reagent is maleic anhydride and the alcohol is a polyol such as pentaerythritol are particularly useful.
Inventors
- 👤 Casper John Dorer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:16
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/02; C08; C08F; C08F8/00; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/1817; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2205/028; C10M2205/17; C10M2205/173; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/026; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/101; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/108; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/12; C10M2211/00; C10M2211/04; C10M2211/044; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/20; C10M2215/202; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/06; C10M2223/065; C10M2227/00; C10M2227/02; C10M2227/04; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/043; C10M2229/044; C10N; C10N2060/00; C10N2060/04
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
121 words
A composition of matter comprising at least one ester made from: A. at least one high molecular weight carboxylic acid reagent prepared by reaction of (1) a low molecular weight, ethylenically unsaturated carboxylic acid reagent with (2) an oxidized, degraded ethylene-propylene interpolymer having a molecular weight of at least 700 and obtained by heating a higher molecular weight ethylene-propylene interpolymer at a temperature of at least 100° C. in the presence of oxygen to cause reduction of at least about 5% in the molecular weight of said interpolymer, and B. at least one mono- or polyhydric alcohol of the formula R(OH).sub.n wherein R is a hydrocarbon-based group of one to about forty carbon atoms and n is one to about six.
Claim 2
Dependent Claim
121 words
A composition of matter comprising at least one ester made from: A. at least one high molecular weight carboxylic acid reagent prepared by reaction of (1) a low molecular weight, ethylenically unsaturated carboxylic acid reagent with (2) an oxidized, degraded ethylene-propylene interpolymer having a molecular weight of at least 700 and obtained by heating a higher molecular weight ethylene-propylene interpolymer at a temperature of at least 100° C. in the presence of oxygen to cause reduction of at least about 5% in the molecular weight of said interpolymer, and B. at least one mono- or polyhydric alcohol of the formula R(OH).sub.n wherein R is a hydrocarbon-based group of one to about forty carbon atoms and n is one to about six.
Claim 3
Dependent Claim
36 words
A composition as claimed in claim 1, wherein the oxidized, degraded ethylene-propylene interpolymer is obtained by heating a high molecular weight ethylene-propylene interpolymer at a temperature of at least about 100° C. to about 350° C.
Claim 4
Dependent Claim
33 words
A composition of matter as claimed in claim 2, wherein the low molecular weight, ethylenically unsaturated carboxylic acid reagent is at least one acrylic acid reagent, methacrylic acid reagent or maleic acid reagent.
Claim 5
Dependent Claim
22 words
A composition of matter as claimed in claim 3, wherein the low molecular weight, ethylenically unsaturated carboxylic acid reagent is maleic anhydride.
Claim 6
Dependent Claim
32 words
A composition of matter as claimed in claim 1, wherein the alcohol (B) is a polyhydric, aliphatic-based alcohol of at least three hydroxyl groups and up to about twelve aliphatic carbon atoms.
Claim 7
Dependent Claim
22 words
A composition of matter as claimed in claim 5, wherein the low molecular weight, ethylenically unsaturated carboxylic acid reagent is maleic anhydride.
Claim 8
Dependent Claim
31 words
A composition of matter as claimed in claim 6, wherein the alcohol (B) is a polyhydric lower alkanol having from 3 to 6 hydroxyl groups and 3 to 7 carbon atoms.
Claim 9
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 1.
Claim 10
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 2.
Claim 11
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 3.
Claim 12
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 4.
Claim 13
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 5.
Claim 14
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 6.
Claim 15
Dependent Claim
27 words
A lubricant composition comprising a major amount of oil and a viscosity improving or sludge dispersing amount of at least one composition as claimed in claim 7.
Claim 16
Dependent Claim
22 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition of claim 1.
Claim 17
Dependent Claim
23 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition claimed in claim 2.
Claim 18
Dependent Claim
23 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition claimed in claim 3.
Claim 19
Dependent Claim
23 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition claimed in claim 4.
Claim 20
Dependent Claim
23 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition claimed in claim 5.
Claim 21
Dependent Claim
23 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition claimed in claim 6.
Claim 22
Dependent Claim
23 words
An additive concentrate for treatment of lubricants and normally liquid fuels comprising about 20 to 90% of the composition claimed in claim 7.
Claim 23
Dependent Claim
143 words
A normally liquid fuel composition comprising a major amount of normally liquid fuel and a sludge dispersing amount of at least one composition of matter comprising at least one ester made from: A. at least one high molecular weight carboxylic acid reagent prepared by reaction of (1) a low molecular weight, ethylenically unsaturated carboxylic acid reagent with (2) an oxidized, degraded ethylene-propylene interpolymer having a molecular weight of at least 700 and obtained by heating a higher molecular weight ethylene-propylene interpolymer at a temperature of at least 100° C. in the presence of oxygen to cause a reduction of at least about 5% in the molecular weight of said interpolymer, and B. at least one mono- or polyhydric alcohol of the formula R(OH).sub.n wherein R is a hydrocarbon-based group of one to about forty carbon atoms and n is one to about six.
Claim 24
Dependent Claim
143 words
A normally liquid fuel composition comprising a major amount of normally liquid fuel and a sludge dispersing amount of at least one composition of matter comprising at least one ester made from: A. at least one high molecular weight carboxylic acid reagent prepared by reaction of (1) a low molecular weight, ethylenically unsaturated carboxylic acid reagent with (2) an oxidized, degraded ethylene-propylene interpolymer having a molecular weight of at least 700 and obtained by heating a higher molecular weight ethylene-propylene interpolymer at a temperature of at least 100° C. in the presence of oxygen to cause a reduction of at least about 5% in the molecular weight of said interpolymer, and B. at least one mono- or polyhydric alcohol of the formula R(OH).sub.n wherein R is a hydrocarbon-based group of one to about forty carbon atoms and n is one to about six.
Claim 25
Dependent Claim
36 words
A composition as claimed in claim 22, wherein the oxidized, degraded ethylene-propylene interpolymer is obtained by heating a high molecular weight ethylene-propylene interpolymer at a temperature of at least about 100° C. to about 350° C.
Claim 26
Dependent Claim
33 words
A composition of matter as claimed in claim 23, wherein the low molecular weight, ethylenically unsaturated carboxylic acid reagent is at least one acrylic acid reagent, methacrylic acid reagent or maleic acid reagent.
Claim 27
Dependent Claim
22 words
A composition of matter as claimed in claim 24, wherein the low molecular weight, ethylenically unsaturated carboxylic acid reagent is maleic anhydride.
Claim 28
Dependent Claim
32 words
A composition of matter as claimed in claim 22, wherein the alcohol (B) is a polyhydric, aliphatic-based alcohol of at least three hydroxyl groups and up to about twelve aliphatic carbon atoms.
Claim 29
Dependent Claim
22 words
A composition of matter as claimed in claim 26 wherein the low molecular weight, ethylenically unsaturated carboxylic acid reagent is maleic anhydride.
Claim 30
Dependent Claim
31 words
A composition of matter as claimed in claim 27, wherein the alcohol (B) is a polyhydric lower alkanol having from 3 to 6 hydroxyl groups and 3 to 7 carbon atoms.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |