Patent ID: 7618928

Claim:
A lubricating oil additive composition comprising: I. an oil-soluble lubricating oil additive prepared by the process which comprises reacting (A) at least one of the following copolymers: (i) a copolymer obtained by free radical copolymerization of components comprising: (a) at least one monoethylenically unsaturated C 3 -C 28 monocarboxylic acid or ester thereof, or C 4 -C 28 dicarboxylic acid, anhydride or ester thereof; (b) at least one 1-olefin comprising about 2 to 40 carbon atoms or at least one polyolefin comprising about 4 to 360 carbon atoms and having a terminal copolymerizable group in the form of a vinyl, vinylidene or alkyl vinylidene group or mixtures thereof; and (c) at least one monoolefin compound which is copolymerizable with the monomers of (a) and (b) and is selected from the group consisting of: (1) an alkyl vinyl ether and an allyl alkyl ether where the alkyl group is hydroxyl, amino, dialkylamino or alkoxy substituted or is unsubstituted, and containing 1 to 40 carbon atoms; (2) an alkyl amine and an N-alkylamide of a monoethylenically unsaturated mono- or dicarboxylic acid of 3 to 10 carbon atoms where the alkyl substituent contains 1 to 40 carbon atoms; (3) an N-vinylcarboxamide of carboxylic acids of 1 to 8 carbon atoms; (4) an N-vinyl substituted nitrogen-containing heterocyclic compound; and (5) at least one 1-olefin comprising about 2 to 40 carbon atoms or at least one polyolefin comprising about 4 to about 360 carbon atoms and having a terminal copolymerizable group in the form of a vinyl, vinylidene or alkyl vinylidene group or mixtures thereof, provided that the olefin employed is not the same as the olefin employed in (i)(b); (ii) a copolymer obtained by reacting compound (i)(a) and compound(i)(b) in the presence of a free radical initiator; (iii) a copolymer obtained by (a) reacting compound (i)(a) with compound (i)(b) or (i)(c) in a non-free radical catalyzed reaction in the presence of copolymer (i) or copolymer (ii) or both; or by (b) contacting copolymer (i) or copolymer (ii) or both with the non-free radical catalyzed reaction product of compound (i)(a) and compound (i)(b) or (i)(c); with (B) at least one ether compound selected from the group consisting of an ether polyamine, a polyether polyamine, a polyether amino alcohol, a polyether amino thiol, and a polyether polyol; and (C) at least one aromatic amine and II. at least one ashless dispersant other than the lubricating oil additive of I.