Patent EP0171167A2 successfully refreshed from Google Patents.
EP0171167A2
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Process for preparation of oil compositions comprising a viscosity index improver-dispersant additive
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1985-06-28
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Granted: —
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Expires: 2005-06-28
Abstract
Abstract Hydrocarbon polymers such as ethylene copolymers may be reacted with unsaturated nitrogen-containing monomers or unsaturated carboxylic acids in the presence of a free radical catalyst such as a peroxide or azo free radical initiator and a chain stopping agent, e.g. a mercaptan to inhibit excessive cross-linking and branching. The copolymer grafted directly with the nitrogen-containing monomers may be utilized as an additive for oil and fuel compositions, particularly lubricating oil compositions as a V.I.-dispersant additive. The polymer reacted with carboxylic acid may be further reacted with amines, polyols, amino-alcohols, etc. to also form a V.L-dispersant additive.
Inventors
- 👤 John Brooke Gardiner
- 👤 Martyn Nisbet Dick
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:16
CPC Classifications
C; C10; C10M; C10M151/00; C10M151/02; C08; C08F; C08F255/00; C08F291/00; C08F8/00; C10M143/00; C10M143/02; C10M145/00; C10M145/02; C10M145/10; C10M145/16; C10M149/00; C10M149/02; C10M149/06; C10M149/10; C10M2205/00; C10M2205/02; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/024; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2221/00; C10M2221/02; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
92 words
A process comprising grafting a hydrocarbon polymer of C 2 to C 28 olefin, said polymer having a number average molecular weight in the range of fran 5,000 to 500,000 with an unsaturated material selected from the group consisting of: (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 the presence of a free radical initiator and a chain stopping agent.
Claim 2
Dependent Claim
92 words
A process comprising grafting a hydrocarbon polymer of C 2 to C 28 olefin, said polymer having a number average molecular weight in the range of fran 5,000 to 500,000 with an unsaturated material selected from the group consisting of: (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 the presence of a free radical initiator and a chain stopping agent.
Claim 3
Dependent Claim
31 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 the group consisting of butadiene and isoprene.
Claim 4
Dependent Claim
24 words
A process according to claim 1, wherein said hydrocarbon polymer is a copolymer of ethylene with a C 3 to C 28 alpha olefin.
Claim 5
Dependent Claim
16 words
A process according to claim3 , wherein said hydrocarbon polymer consists essentially of ethylene and propylene.
Claim 6
Dependent Claim
40 words
A process according to claim 4, wherein said copolymer consists essentially of 30 to 80 weight % ethylene and 20 to 70 weight % propylene, and has a number of average molecular weight in the range of 10,000 to 200,000.
Claim 7
Dependent Claim
19 words
A process according to claim 3, wherein said ethylene copolymer is terpolymer of ethylene, propylene and an unsaturated diene.
Claim 8
Dependent Claim
70 words
A process according to any of claims 1-6, wherein a homogeneous mixture is formed of said ethylene copolymer, unsaturated material, initiator and chain stopping agent by heating and mixing at a first temperature below the temperature at which said initiator generates substantial free radicals, and then heating and mixing at a second higher temperature at which said initiator generates substantial free radicals and a major proportion of said grafting place.
Claim 9
Dependent Claim
36 words
A process according to claim 7 wherein said first temperature is in the range of from 100 to 160 0 C. and said second temperature is in the range of from 170 to 240 0 C.
Claim 10
Dependent Claim
83 words
9 . A process according to claim 7 or 8 wherein said process is carried out in multiple stages, said first stage comprising forming said homogeneous mixture at said first temperature, then heating and mixing at said second temperature to effect grafting; and at least one additional stage of cooling to said first temperature, adding additional unsaturated material, initiator, and chain stopping agent at said first temperature and reheating and mixing to said second temperature to effect grafting of said additional unsaturated material.
Claim 11
Dependent Claim
57 words
10 . A process according to claim 3 wherein said ethylene copolymer is a normally solid rubber at room temperature and mixing is carried out in a mechanical mixer which heats and kneads said rubber, unsaturated material, initiator and chain stopping agent into a homogeneous solid rubbery mass in which grafting takes place in the solid state.
Claim 12
Dependent Claim
16 words
A process according to any of claims 1 - 10 wherein unsaturated material is maleic anhydride.
Claim 13
Dependent Claim
29 words
A process according to any of claims 1 to 10 wherein said nitrogen containing monomer is selected from the group consisting of vinyl pyridines, vinyl pyrrolidones, acrylates and methacrylates.
Claim 14
Dependent Claim
38 words
A process according to any of claims 1 to 12 wherein said grafting is carried out in the substantial absence of solvent, and the grafted material is subsequently mixed with mineral lubricating oil to form an oil concentrate.
Claim 15
Dependent Claim
45 words
A process according to claim 13 wherein said graft material is dissolved in a mineral lubricating oil and reacted with an amine having 2 to 60 carbon atoms and 1 to 12 amine groups to form an oil soluble Viscosity-Index inproving - dispersant additive concentrate.
Claim 16
Dependent Claim
19 words
A process according to claim 14 wherein said amine is a polyamine having at least one primary amine group.
Claim 17
Dependent Claim
18 words
A process according to any of claims 1 to 15 wherein said free radical initiator is a peroxide.
Claim 18
Dependent Claim
24 words
A process according to any of claims 1 to 16 wherein said chain stopping agent is a C 4 to C 24 aliphatic mercaptan.
Claim 19
Dependent Claim
22 words
The use in a lubricating oil composition of a product produced by a process according to any of claims 1 to 17.
Claim 20
Dependent Claim
14 words
A lubricating oil composition comprising a lubricating oil and the product of claim 18.
References Cited (Backward Citations)
No citation records indexed.
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