Multifunctional viscosity index improver

Details Multifunctional viscosity index improver Multifunctional viscosity index improver

C - Chemistry, Metallurgy

08

F

253/128, 400/202

C08F 255/00 (2006.01) C08F 257/02 (2006.01) C08F 287/00 (2006.01) C10M 145/02 (2006.01) C10M 149/02 (2006.01)

Patent

CA 1257428

ABSTRACT OF THE DISCLOSURE 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 composi- tions particularly lubricating oil compositions as a V.I.- dispersant additive. The polymer reacted with carboxylic acid may be further reacted with amines or amino-alcohols to also form a multifunctional V.I.- dispersant additive.

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