US4161452A
Expired / Lapsed
US
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Polyolefinic copolymer additives for lubricants and fuels
Assignee: Rohm and Haas Co
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Filing: 1977-12-05
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Granted: 1979-07-17
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Expires: 1997-12-05
Abstract
Abstract Graft copolymers wherein the backbone polymer is a polymeric hydrocarbon such as ethylene/propylene copolymer and the grafted units are the residues of an addition copolymerizable monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other addition monomer. Preferably, the monomer residues are post-reacted with an alcohol or an amino alcohol. The graft copolymers are prepared with a free radical initiator which is blended with the reactants at a temperature below the initiator decomposition temperature, followed by heating to the decomposition temperature. The graft copolymers impart combined detergent, viscosity index improvement and other useful properties to lubricating oils and hydrocarbon motor fuels.
Inventors
- 👤 Robert L. Stambaugh
- 👤 Richard A. Galluccio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C08; C08F; C08F291/00; C08F291/02; C08F8/00; C08F8/14; C08F8/30; C08F8/32; C10L1/22; C10L1/234; C10L1/236; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/16; C08F2810/00; C08F2810/20; C10M2203/00; C10M2203/06; C10M2205/00; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2211/00; C10M2211/02; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/028; C10M2217/04; C10M2217/044; C10M2217/045; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2010/08; C10N2010/12; C10N2040/00; C10N2040/02; C10N2040/08; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
103 words
A composition comprising a major amount of a lubricating oil and a minor detergent amount of a graft copolymer prepared by intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, the temperature during admixing in the presence of the initiator being below the decomposition temperature of the initiator, and thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 2
Dependent Claim
103 words
A composition comprising a major amount of a lubricating oil and a minor detergent amount of a graft copolymer prepared by intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, the temperature during admixing in the presence of the initiator being below the decomposition temperature of the initiator, and thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 3
Dependent Claim
37 words
A composition as in claim 1 wherein the backbone polymer and copolymerizable monomers are dissolved in a solvent, and the initiator is thereafter intimately admixed therein while maintaining the temperature below the decomposition temperature of the initiator.
Claim 4
Dependent Claim
14 words
A composition as in claim 2 wherein the solvent is a halogenated aromatic hydrocarbon.
Claim 5
Dependent Claim
13 words
A composition as in claim 2 wherein the solvent is a mineral oil.
Claim 6
Dependent Claim
26 words
A composition as in claim 1 wherein the backbone polymer is selected from polyolefins, ethylene/propylene copolymers, ethylene/propylene/diene modified copolymers, hydrogenated styrene-butadiene copolymers, and hydrogenated styrene-isoprene copolymers.
Claim 7
Dependent Claim
18 words
A composition as in claim 1 wherein the graft copolymer is post-reacted with an alcohol or amino alcohol.
Claim 8
Dependent Claim
37 words
A composition as in claim 1 wherein the unsaturated polycarboxylic acid or anhydride is maleic acid or anhydride, said other monomer is methyl acrylate or styrene, and the graft copolymer is post-reacted with methanol, 1,2,4-butanetriol or monoethanolamine.
Claim 9
Dependent Claim
20 words
A composition as in claim 1 wherein the graft copolymer contains about 2-20% by weight of the graft monomer units.
Claim 10
Dependent Claim
104 words
A composition comprising a major amount of a hydrocarbon motor fuel and a minor detergent amount of a graft copolymer prepared by intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, the temperature during admixing in the presence of the initiator being below the decomposition temperature of the initiator, and thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 11
Dependent Claim
104 words
A composition comprising a major amount of a hydrocarbon motor fuel and a minor detergent amount of a graft copolymer prepared by intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, the temperature during admixing in the presence of the initiator being below the decomposition temperature of the initiator, and thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 12
Dependent Claim
19 words
A composition as in claim 9 wherein the graft copolymer is post-reacted with an alcohol or an amino alcohol.
Claim 13
Dependent Claim
37 words
A composition as in claim 9 wherein the backbone polymer and copolymerizable monomers are dissolved in a solvent, and the initiator is thereafter intimately admixed therein while maintaining the temperature below the decomposition temperature of the initiator.
Claim 14
Dependent Claim
14 words
A composition as in claim 9 wherein the solvent is a halogenated aromatic hydrocarbon.
Claim 15
Dependent Claim
13 words
A composition as in claim 9 wherein the solvent is a mineral oil.
Claim 16
Dependent Claim
27 words
A composition as in claim 9 wherein the backbone polymer is selected from polyolefins, ethylene/propylene copolymers, ethylene/propylene diene modified copolymers, hydrogenated styrene-butadiene copolymers, and hydrogenated styrene-isoprene copolymers.
Claim 17
Dependent Claim
38 words
A composition as in claim 8 wherein the unsaturated polycarboxylic acid or anhydride is maleic acid or anhydride and said other monomer is methyl acrylate or styrene, and the graft copolymer is post-reacted with methanol, 1,2,4-butanetriol or monoethanolamine.
Claim 18
Dependent Claim
20 words
A composition as in claim 9 wherein the graft copolymer contains about 2-20% by weight of the copolymerizable monomer units.
Claim 19
Dependent Claim
98 words
A graft copolymer useful as an additive for lubricating oils and hydrocarbon motor fuels, prepared by intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, the temperature during admixing in the presence of the initiator being below the decomposition temperature of the initiator, and thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 20
Dependent Claim
98 words
A graft copolymer useful as an additive for lubricating oils and hydrocarbon motor fuels, prepared by intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, the temperature during admixing in the presence of the initiator being below the decomposition temperature of the initiator, and thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 21
Dependent Claim
18 words
The graft copolymer of claim 17 wherein the grafted monomer units are post-reacted with an alcohol or amino-alcohol.
Claim 22
Dependent Claim
26 words
The graft copolymer of claim 17 wherein the backbone polymer is selected from polyolefins, ethylene/propylene copolymers, ethylene/propylene/diene modified copolymers, hydrogenated styrene-butadiene copolymers, and hydrogenated styrene-isoprene copolymers.
Claim 23
Dependent Claim
38 words
The graft copolymer of claim 17 wherein the unsaturated polycarboxylic acid or anhydride is maleic acid or anhydride, said other monomer is methyl acrylate or styrene, and the grafted monomer units are post-reacted with methanol, 1,2,4-butanetriol or monoethanolamine.
Claim 24
Dependent Claim
90 words
A process for preparing an oil soluble graft copolymer useful as an additive for lubricating oils and hydrocarbon motor fuels, comprising the steps of (1) intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, and (2) thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 25
Dependent Claim
90 words
A process for preparing an oil soluble graft copolymer useful as an additive for lubricating oils and hydrocarbon motor fuels, comprising the steps of (1) intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) an addition copolymerizable graft monomer system comprising an unsaturated polycarboxylic acid or anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator capable of hydrogen abstraction, and (2) thereafter increasing the temperature of the mixture to or above the decomposition temperature of the initiator.
Claim 26
Dependent Claim
37 words
The process of claim 21 wherein the backbone polymer and copolymerizable graft monomers are dissolved in a solvent, and the initiator is thereafter intimately admixed therein while maintaining the temperature below the decomposition temperature of the initiator.
Claim 27
Dependent Claim
17 words
The process of claim 21 wherein the solvent is a chlorinated aromatic hydrocarbon or a mineral oil.
Claim 28
Dependent Claim
17 words
The process of claim 21 wherein the graft copolymer is post-reacted with an alcohol or amino alcohol.
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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) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |