Multifunctional viscosity index improver

Details Multifunctional viscosity index improver Multifunctional viscosity index improver

C - Chemistry, Metallurgy

10

M

253/102, 400/307

C10M 159/12 (2006.01) C08F 8/32 (2006.01) C08F 8/46 (2006.01) C10L 1/196 (2006.01) C10L 1/236 (2006.01) C10M 143/02 (2006.01) C10M 145/10 (2006.01) C10M 145/16 (2006.01) C10M 149/06 (2006.01)

Patent

CA 1339787

Oleaginous compositions, particularly lubricating oil compositions, exhibiting improved low temperature viscometric properties containing a viscosity index improving amount of a V.I.-dispersant comprised of the reaction products of: (a) an oil soluble ethylene copolymer comprising from about 15 to 90 wt. % ethylene and from about 10 to 85 wt. % of at least one C3 to C28 alpha-olefin, having a number average molecular weight of from about 5,000 to 500,000, grafted with an ethylenically unsaturated carboxylic acid material having 1 or 2 acid or anhydride moieties; (b) an organic polyamine having at least two primary amino groups or a polyol; and (c) an amount effective to provide a V.I. improver-dispersant exhibiting improved low temperature viscometric properties of high functionality long chain hydrocarbyl substituted dicarboxylic acid material having a functionality of at least 1.2.

605185

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