Ethylene copolymer viscosity index improver - dispersant...

Details Ethylene copolymer viscosity index improver - dispersant... Ethylene copolymer viscosity index improver - dispersant...

C - Chemistry, Metallurgy

08

L

253/102, 400/307

C08L 51/08 (2006.01) C08F 8/32 (2006.01) C10M 143/02 (2006.01)

Patent

CA 1180842

ABSTRACT OF THE DISCLOSURE Oil-soluble viscosity index-improving ethylene copolymers, such as copolymers of ethylene and propylene; and ethylene, propylene and diolefin; etc., are reacted or grafted with ethylenically unsaturated carboxylic acid moieties, preferably maleic anhydride, and reacted with polyamines having two or more primary amine groups and a carboxylic acid component, preferably alkylene polyamine and alkenyl succinic anhydride, such as polyisobutenyl succinic anhydride; or the grafted ethylene copolymer can be reacted with already formed salts, amides, imides, etc. of said polyamine and acid component, preferably imides of alkylene polyamine and alkenyl succinic anhydride. These reactions can permit the incorporation of varnish inhibition and dis- persancy into the ethylene copolymer while inhibiting cross- linking with resulting viscosity increase, haze or gelling.

401293

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