Patent ID: 6127321
Filing Date: 2000-10-03
Classification: C08F,C10L,C10M,C10N

Abstract:
A lubricating oil composition comprising (i) a lubricating oil, (ii) a metal-containing detergent or anti-rust additive and (iii) an oil soluble dispersant, the dispersant comprising the oil soluble reaction product of a reaction mixture comprising:(a) a hydrocarbyl substituted C.sub.4 to C.sub.10 dicarboxylic acid producing material formed by reacting olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight of about 1500 to 5,000 and a C.sub.4 to C.sub.10 monounsaturated acid material, wherein said substituted material is characterized by a functionality ratio of from about 1.05 to 1.25 dicarboxylic acid producing moieties per molecule of said olefin polymer used in the reaction; and(b) a basic reactant selected from the group consisting of amine, alcohol, amino alcohol and mixtures thereof.