Viscosity index improver-dispersant additive

Details Viscosity index improver-dispersant additive Viscosity index improver-dispersant additive

1985-07-08

1988-04-05

Dixon, Jr., William R.

Compositions

Electrolytes for electrical devices

252 515A, 252 56D, 252 56R, 525299, 525301, C10M13316

Patent

active

047357363

ABSTRACT:
Oil soluble hydrocarbon polymers, useful as V.I. improvers, such as ethylene copolymer, preferably ethylene-propylene copolymer, are grafted with an unsaturated acid material, such as maleic anhydride, preferably by solid state grafting followed by reaction with a polyamine, preferably a tertiary-primary amine, and treatment and/or reaction with monoamine. The resulting material is used in oil compositions, such as lubricating oil, as a Viscosity Index improver having sludge dispersancy properties. The monoamine treatment inhibits viscosity growth of the additive upon storage.

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patent: 4282132 (1981-08-01), Benda et al.
patent: 4320019 (1982-03-01), Hayashi

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