Dispersant, VI improver and antioxidant additive.

摘要

An additive reaction product prepared by reacting a copolymer selected from the group consisting of ethylene copolymers prepared from ethylene and at least one C3-C10 alpha-monoolefin and, optionally, a polyene and block copolymers prepared from styrene and a diene monomer with at least one olefinic carboxylic acid acylating agent, reacting said reaction intermediate with an unsaturated hydrocarbyl amine to form an imide reaction product; and reacting said imide reaction product with a nitroso compound, and a lubricating oil composition containing same.