EP0225048A2
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EP
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Multifunctional viscosity improver
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1986-10-28
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Granted: —
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Expires: 2006-10-28
Abstract
Abstract Hydrocarbon polymers such as ethylene copolymers may be reacted with unsaturated nitrogen-containing monomers or unsaturated carboxylic acids in a synthetic hydrocarbon lubricating oil in the presence of a free radical initiator such as a peroxide. The copolymer grafted directly with the nitrogen-containing monomers may be utilized as an additive for oil compositions, particularly lubricating oil compositions as a V.I.-dispersant additive. The polymer reacted with carboxylic acid may be further reacted with amines or aminoalcohols to also form a multifunctional V.I.-dispersant additive.
Inventors
- 👤 Vijaya Kezhupillil Varma
- 👤 Esther Deffley Winans
- 👤 Rosemary O'halloran
- 👤 Phillip William Brewster
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:29
CPC Classifications
C; C08; C08F; C08F287/00; C08F255/00; C08F257/00; C08F257/02; C10; C10M; C10M143/00; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C10M145/16; C10M149/00; C10M149/02; C10M149/04; C10M149/06; C10M149/12; C10M149/14; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/026; C10M2205/028; C10M2205/06; C10M2205/14; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/028; C10M2217/04; C10M2217/041; C10M2217/046; C10M2217/06; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
95 words
A process comprising solution grafting a normally solid hydrocarbon polymer of C 2 to C 28 olefin, said polymer having a number average molecular weight in the range of from 5,000 to 500,000 with an unsaturated material selected from (A) ethylenically unsaturated C 3 to C 10 carboxylic acid having 1 to 2 carboxylic acid groups or an anhydride group, and (B) nitrogen-containing ethylenically unsaturated monomers containing 6 to 30 carbon atoms and 1 to 4 nitrogen atoms, in a synthetic hydrocarbon oil having a number average molecular weight of from 200 to 10,000. c
Claim 2
Dependent Claim
95 words
A process comprising solution grafting a normally solid hydrocarbon polymer of C 2 to C 28 olefin, said polymer having a number average molecular weight in the range of from 5,000 to 500,000 with an unsaturated material selected from (A) ethylenically unsaturated C 3 to C 10 carboxylic acid having 1 to 2 carboxylic acid groups or an anhydride group, and (B) nitrogen-containing ethylenically unsaturated monomers containing 6 to 30 carbon atoms and 1 to 4 nitrogen atoms, in a synthetic hydrocarbon oil having a number average molecular weight of from 200 to 10,000. c
Claim 3
Dependent Claim
41 words
A process-according to claim 1, wherein said hydrocarbon polymer is a hydrogenated copolymer of styrene with at least one aliphatic diene selected from butadiene and isoprene, a copolymer of ethylene with a C 3 to C 28 alpha olefin or polyisobutylene.
Claim 4
Dependent Claim
23 words
A process according to claim 2, wherein said hydrocarbon polymer is a hydrogenated polymer of blocks of styrene with blocks of said diene.
Claim 5
Dependent Claim
111 words
A process as claimed in claim 2 which comprises grafting with a free radical initiator, an amount of an oil-soluble ethylene copolymer comprising from 15 to 90 weight % ethylene and from 10 to 85 weight % of C 3 to C 28 alpha-olefin, said copolymer having a number average molecular weight of from 5,000 to 500,000 with the unsaturated material, to C 10 carboxylic acid having 1 to 2 carboxylic acid groups or an anhydride group, and nitrogen-containing ethylenically unsaturated monomers dissolved in a major amount of the synthetic hydrocarbon oil, said synthetic hydrocarbon oil being selected from alkylated benzene and polymers of C 3 to C 18 monounsaturated olefins.
Claim 6
Dependent Claim
39 words
A process according to claim 4, wherein said copolymer consists essentially of from 30 to 80 weight % ethylene and from 20 to 70 weight % propylene, and has a number average molecular weight of from 10,000 to 200,000.
Claim 7
Dependent Claim
16 words
A process according to claim 4, wherein said unsaturated material is said nitrogen-containing ethylenically unsaturated monomer.
Claim 8
Dependent Claim
23 words
A process according to claim 6, wherein said nitrogen containing monomer is a vinyl pyridine, vinyl pyrrolidone, or a nitrogen-containing acrylate or methacrylate.
Claim 9
Dependent Claim
24 words
A process according to claim 4, wherein the synthetic hydrocarbon oil is benzene alkylated with groups each having from 10 to 30 carbon atoms.
Claim 10
Dependent Claim
19 words
A process according to claim 4, wherein the synthetic hydrocarbon oil is polyisobutylene of 200 to 2,000 mol. wt.
Claim 11
Dependent Claim
16 words
A process according to claim 4, wherein the synthetic hydrocarbon oil is a polymer of decene-1.
Claim 12
Dependent Claim
47 words
A process according to any of claims 4 to 10, wherein said copolymer is grafted with said unsaturated material by mixing said copolymer, dissolved in a polyolefin synthetic lubricating oil, unsaturated material and free radical initiator at from 120 to 250°C for from 0.1 to 12 hours.
Claim 13
Dependent Claim
72 words
A process according to claim 11, wherein from 5 to 50% of said copolymer is dissolved in 95 to 50 wt. % of synthetic hydrocarbon lubricating oil to form a solution and the amount of said unsaturated material is from 0.05 to 10 wt. %, based upon the weight of said solution and the amount of said initiator is from 0.005 to 1 wt. %, based on the weight of said solution.
Claim 14
Dependent Claim
32 words
A process as claimed in any of the preceding claims, in which, after grafting, mineral lubricating oil is added, followed by addition of amine sufficient to neutralize said acid, followed by heating.
Claim 15
Dependent Claim
60 words
A process as claimed in claim 13, in which from 40 to 500 wt. %, based on the weight of solution of the mineral oil, is added, in which from 0.1 to 10 wt. %, based on the weight of olefin polymer of amine is added, and the heating is to from 100 to 250°C for 0.5 to 10 hours.
Claim 16
Dependent Claim
16 words
A process according to claim 13 or claim 14, wherein said unsaturated material is maleic anhydride.
Claim 17
Dependent Claim
39 words
A process according to any of claims 13 to 15, wherein the amine has from 2 to 60 carbon atoms and 1 to 12 amine groups and the process forms an oil soluble Viscosity-Index improving - dispersant additive concentrate.
Claim 18
Dependent Claim
25 words
An oil composition comprising a major amount of lubricating oil, and a V.I.-dispersant additive concentrate as prepared by a process as claimed in claim 13.
Claim 19
Dependent Claim
37 words
A lubricating oil composition as claimed in claim 17, wherein the amount of said concentrate is sufficient to incorporate from 0.01 to 10 wt. % of a nitrogen-containing grafted oil soluble copolymer in said lubricating oil composition.
References Cited (Backward Citations)
No citation records indexed.
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