Viscosity index improver--dispersant additive useful in oil comp

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

1987-06-18

1988-10-25

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

252 515A, 252 56D, 252 56R, 525256, 525259, 525261, 525263, 525301, 525382, C10M14510

Patent

active

047802286

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.I.-dispersant additive.

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