Patent EP0002286A2 successfully refreshed from Google Patents.
EP0002286A2
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EP
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Lubricant or fuel
Assignee: Rohm and Haas Co
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Filing: 1978-12-05
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Granted: —
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Expires: 1998-12-05
Abstract
Abstract Graft copolymers are disclosed in which the backbone comprises a hydrocarbon polymer, such as an 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, the grafts being post-reacted with a polyamino compound. The graft copolymers impart combined detergent and viscosity index properties to lubricating oils and hydrocarbon motor fuels.
Inventors
- 👤 Robert Lee Stambaugh
- 👤 Richard Adrianne Galluccio
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 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: 16
Claim 1
Independent Claim
77 words
An oil-soluble graft copolymer, suitable for use as an additive for lubricating oils and liquid hydrocarbon fuels, comprising substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid and/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 containing one primary or secondary amino group or one primary amido group.
Claim 2
Dependent Claim
77 words
An oil-soluble graft copolymer, suitable for use as an additive for lubricating oils and liquid hydrocarbon fuels, comprising substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer and graft polymerized thereon, copolymerized units of a monomer system comprising maleic acid and/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 containing one primary or secondary amino group or one primary amido group.
Claim 3
Dependent Claim
56 words
A graft copolymer as claimed in claim 1 wherein the other monomer comprises one or more of C l -C 12 alkyl esters of acrylic and methacrylic acid, styrene, a-methyl styrene, C 1 -C 4 alky1 and alkoxy ring substituted styrene, C 4 -C 12 alpha olefins, vinyl esters, vinyl ketones, and vinyl and vinylidene chloride.
Claim 4
Dependent Claim
48 words
A graft copolymer as claimed in claim 1 or.2 wherein the ratio of maleic acid or anhydride to the other monomer is from 1:4 to 4:1 by weight, and the graft copolymer contains from 1 to 10% by weight of units derived from maleic acid and/or maleic anhydride.
Claim 5
Dependent Claim
32 words
A graft copolymer as claimed in any of claims 1 to 3 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 6
Dependent Claim
35 words
A graft copolymer as claimed in claim 4 wherein the backbone polymer is an ethylene-propylene copolymer, the grafted monomers are maleic anhydride and methyl methacrylate and the polyamino compound is N-(3-aminopropyl)morpholine, N,N-dimethylaminopropylamine or 4-aminomethyl pyridine.
Claim 7
Dependent Claim
30 words
A graft copolymer as claimed in claim 4 wherein the backbone polymer is an ethylene-propylene copolymer, the grafted monomers are maleic anhydride and styrene, and the polyamino compound is N-(3-aminopropy1)morpholine.
Claim 8
Dependent Claim
45 words
A graft copolymer as claimed in any of claims 4 to 6 wherein the backbone polymer is an ethylene/propylene copolymer containing from 50 to 70 mole % ethylene and having a viscosity average molecular weight of from 10,000 to 200,000 and of less than four.
Claim 9
Dependent Claim
110 words
A process for.preparing.a graft copolymer according to claim 1 which comprises intimately admixing (a) an oil soluble, substantially linear, substantially saturated, rubbery, olefinic hydrocarbon backbone polymer, (b) a graft monomer system comprising maleic acid and/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 and subsequently reacting a polyamino compound having one primary or secondary amino group or one primary amido group with the copolymerized monomer system.
Claim 10
Dependent Claim
38 words
A process as claimed in claim 8 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 11
Dependent Claim
25 words
A process as claimed in claim 8 or 9 wherein the molecular weight of the backbone polymer is reduced after the formation of grafts thereon.
Claim 12
Dependent Claim
55 words
A lubricant or fuel which comprises a major amount of a natural or synthetic lubricant or a liquid hydrocarbon fuel having dissolved or dispersed therein a minor amount of graft copolymer as claimed in any of claims 1 to 7 and/or as prepared by a process as claimed in any of claims 8 to 1C
Claim 13
Dependent Claim
23 words
A lubricant as claimed in claim 11 which comprises a lubricating oil containing from 0.1 to 5% by weight of the graft copolymer.
Claim 14
Dependent Claim
25 words
A fuel as claimed in claim 11 which comprises a liquid hydrocarbon motor fuel containing from 0.001 to 0.1% by weight of the graft copolymer.
Claim 15
Dependent Claim
24 words
A fuel as claimed in claim 11 or 13 which comprises a major amount of a hydrocarbon base fuel distilling within the gasoline distillation'range.
Claim 16
Dependent Claim
57 words
A lubricant or fuel additive composition comprising lubricant or fuel and/or solvent suitable for addition to or dilution with said lubricant or fuel and from 7 to 15% by weight of graft copolymer as claimed in any of claims 1 to 7 and/or as prepared by a process as claimed in any of claims 8 to 10.
References Cited (Backward Citations)
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