Patent ID: 8980804
Filing Date: 2015-03-17
Classification: C08F,C10M,C10N

Abstract:
1. A dispersant additive comprising a reaction product obtained by reacting i) a first set of monomers comprising alkylacrylates comprising three different subgroups including a first subgroup of alkyl acrylates wherein the alkyl group has 1 to 4 carbon atoms, a second subgroup thereof wherein the alkyl group has 8 to 16 carbon atoms, and a third subgroup wherein the alkyl group has 17 to 30 carbon atoms, with ii) a second monomer comprising an unsaturated anhydride acylating agent under conditions effective for free radical polymerization of the first and second monomers to provide a base polymer comprising an acylated alkylacrylate copolymer having a weight average molecular weight between about 5,000 and about 50,000, and after formation of the acylated alkylacrylate copolymer base polymer, reacting the base polymer with hydrocarbyl amine to form an amine-functionalized polyalkylacrylate copolymer dispersant, wherein the hydrocarbyl amine further comprises an acylated mono polyisobutylene succinimide group.