US4160739A
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: 1979-07-10
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Expires: 1997-12-05
Abstract
Abstract {PG,1 Graft copolymers wherein the backbone polymer is a polymeric hydrocarbon such as ethylene/propylene copolymer and the grafted units are the residues of a monomer system comprising maleic acid or anhydride and one or more other monomers copolymerizable therewith, the monomer system being post-reacted with a polyamine compound. 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
2026-10-31 10:50
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/02; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/221; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/06; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/08; C10M2209/084; C10M2209/086; C10M2209/10; C10M2209/103; C10M2209/109; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/066; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/10; C10M2219/104; C10M2219/108; C10M2221/00; C10M2221/04; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2223/12; C10M2225/00; C10M2225/02; 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; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
78 words
A composition comprising a major amount of a lubricating oil and a minor detergent amount of a graft copolymer comprising an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid or maleic anhydride and one or more other monomers copolymerizable with maleic acid or maleic anhydride, said copolymerized units being post-reacted with a polyamino compound having one reactive primary or secondary amino group.
Claim 2
Dependent Claim
78 words
A composition comprising a major amount of a lubricating oil and a minor detergent amount of a graft copolymer comprising an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid or maleic anhydride and one or more other monomers copolymerizable with maleic acid or maleic anhydride, said copolymerized units being post-reacted with a polyamino compound having one reactive primary or secondary amino group.
Claim 3
Dependent Claim
68 words
The composition of claim 1 wherein said other monomers are selected from one or more groups consisting of C 1 -C 12 alkyl esters of acrylic and methacrylic acid, styrene, α-methyl styrene, C 1 -C 4 alkyl and alkoxy ring substituted styrene, C 4 -C 12 alpha olefins, vinyl esters, vinyl ketones, and vinyl and vinylidene chloride, and the polyamino compounds contain at least one tertiary amino group.
Claim 4
Dependent Claim
39 words
The composition of claim 1 wherein the ratio of maleic acid or anhydride to said other monomer is about 1:4 to 4:1 by weight, and said graft copolymer contains about 1-10% by weight of said maleic acid or anhydride.
Claim 5
Dependent Claim
25 words
The composition of claim 1 wherein said backbone polymer is selected from polyolefins, ethylene/propylene copolymers, ethylene/propylene/diene modified copolymers, hydrogenated styrene-butadiene copolymers, and hydrogenated styrene-isoprene copolymers.
Claim 6
Dependent Claim
29 words
The composition of claim 1 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and methyl methacrylate, and said amino compound is N-(3-aminopropyl) morpholine.
Claim 7
Dependent Claim
28 words
The composition of claim 1 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and styrene, and said amino compound is N-(3-aminopropyl) morpholine.
Claim 8
Dependent Claim
28 words
The composition of claim 1 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and methyl methacrylate, and said amino compound is N,N-dimethylaminopropylamine.
Claim 9
Dependent Claim
29 words
The composition of claim 1 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and methyl methacrylate, and said amino compound is 4-aminomethyl pyridine.
Claim 10
Dependent Claim
115 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) a graft monomer system comprising maleic acid or maleic anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator, 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, followed by post-reaction of the monomer system with a polyamino compound having one reactive primary or secondary amino group.
Claim 11
Dependent Claim
115 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) a graft monomer system comprising maleic acid or maleic anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator, 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, followed by post-reaction of the monomer system with a polyamino compound having one reactive primary or secondary amino group.
Claim 12
Dependent Claim
36 words
The composition of claim 9 wherein the backbone polymer and 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 13
Dependent Claim
13 words
The composition of claim 10 wherein the solvent is a halogenated aromatic hydrocarbon.
Claim 14
Dependent Claim
12 words
The composition of claim 10 wherein the solvent is a mineral oil.
Claim 15
Dependent Claim
79 words
A composition comprising a major amount of a hydrocarbon motor fuel and a minor detergent amount of a graft copolymer comprising an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid or maleic anhydride and one or more other monomers copolymerizable with maleic acid or maleic anhydride, said copolymerized units being post-reacted with a polyamino compound having one reactive primary or secondary amino group.
Claim 16
Dependent Claim
79 words
A composition comprising a major amount of a hydrocarbon motor fuel and a minor detergent amount of a graft copolymer comprising an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid or maleic anhydride and one or more other monomers copolymerizable with maleic acid or maleic anhydride, said copolymerized units being post-reacted with a polyamino compound having one reactive primary or secondary amino group.
Claim 17
Dependent Claim
73 words
A graft copolymer useful as an additive for lubricating oils and hydrocarbon motor fuels, comprising an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid or maleic anhydride and one or more other monomers copolymerizable with maleic acid or maleic anhydride, said copolymerized units being post-reacted with a polyamino compound having one reactive primary or secondary amino group.
Claim 18
Dependent Claim
73 words
A graft copolymer useful as an additive for lubricating oils and hydrocarbon motor fuels, comprising an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid or maleic anhydride and one or more other monomers copolymerizable with maleic acid or maleic anhydride, said copolymerized units being post-reacted with a polyamino compound having one reactive primary or secondary amino group.
Claim 19
Dependent Claim
69 words
The graft copolymer of claim 14 wherein said other monomers are selected from one or more groups consisting of C 1 -C 12 alkyl esters of acrylic and methacrylic acid, styrene, α-methyl styrene, C 1 -C 4 alkyl and alkoxy ring substituted styrene, C 4 -C 12 alpha olefins, vinyl esters, vinyl ketones, and vinyl and vinylidene chloride, and the polyamino compounds contain at least one tertiary amino group.
Claim 20
Dependent Claim
40 words
The graft copolymer of claim 14 wherein the ratio of maleic acid or anhydride to said other monomer is about 1:4 to 4:1 by weight, and said graft copolymer contains about 1-10% by weight of said maleic acid or anhydride.
Claim 21
Dependent Claim
26 words
The graft copolymer of claim 14 wherein said backbone polymer is selected from polyolefins, ethylene/propylene copolymers, ethylene/propylene/diene modified copolymers, hydrogenated styrene-butadiene copolymers, and hydrogenated styrene-isoprene copolymers.
Claim 22
Dependent Claim
30 words
The graft copolymer of claim 14 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and methyl methacrylate, and said amino compound is N-(3-aminopropyl) morpholine.
Claim 23
Dependent Claim
28 words
The graft copolymer of claim 14 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and styrene, and said amino compound is N-(3-aminopropyl)morpholine.
Claim 24
Dependent Claim
29 words
The graft copolymer of claim 14 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and methyl methacrylate, and said amino compound is N,N-dimethylaminopropylamine.
Claim 25
Dependent Claim
30 words
The graft copolymer of claim 14 wherein said backbone polymer is an ethylene-propylene copolymer, said grafted monomers are maleic anhydride and methyl methacrylate, and said amino compound is 4-aminomethyl pyridine.
Claim 26
Dependent Claim
112 words
A process for preparing a graft copolymer useful as a lubricating oil or hydrocarbon motor fuel additive, comprising intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) a graft monomer system comprising maleic acid or maleic anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator, 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, followed by post-reaction of the monomer system with a polyamino compound having one reactive primary or secondary amino group.
Claim 27
Dependent Claim
112 words
A process for preparing a graft copolymer useful as a lubricating oil or hydrocarbon motor fuel additive, comprising intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) a graft monomer system comprising maleic acid or maleic anhydride and at least one other monomer copolymerizable therewith, and (c) a free radical initiator, 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, followed by post-reaction of the monomer system with a polyamino compound having one reactive primary or secondary amino group.
Claim 28
Dependent Claim
36 words
The process of claim 22 wherein the backbone polymer and 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 29
Dependent Claim
13 words
The composition of claims 1 or 9 wherein the polyamino compound is N-phenylurea.
Claim 30
Dependent Claim
12 words
The graft copolymer of claim 14 wherein the polyamino compound is N-phenylurea.
Claim 31
Dependent Claim
11 words
The process of claim 22 wherein the polyamino compound is N-phenylurea.
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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) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |