Viscosity index improver - dispersant additive useful in oil...

Details Viscosity index improver - dispersant additive useful in oil... Viscosity index improver - dispersant additive useful in oil...

C - Chemistry, Metallurgy

08

F

400/2022, 400/30

C08F 255/00 (2006.01) C08F 8/00 (2006.01) C08F 291/00 (2006.01) C10M 101/00 (2006.01) C10M 143/02 (2006.01) C10M 145/16 (2006.01) C10M 149/02 (2006.01) C10M 151/02 (2006.01)

Patent

CA 1264880

ABSTRACT OF THE DISCLOSURE Hydrocarbon polymers such as ethylene copo- lymers may be reacted with unsaturated nitrogen-contain- ing monomers or unsaturated carboxylic acids in the pre- sence 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 ni- trogen-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 re- acted with amines, polyols, amino-alcohols, etc. to also form a V.I.-dispersant additive.

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