Lubricating oil additives

Details Lubricating oil additives Lubricating oil additives

C - Chemistry, Metallurgy

10

M

C10M 159/12 (2006.01) C08F 8/30 (2006.01) C08G 81/02 (2006.01) C08G 85/00 (2006.01) C10L 1/22 (2006.01) C10M 129/92 (2006.01) C10M 129/93 (2006.01) C10M 129/95 (2006.01) C10M 133/02 (2006.01) C10M 133/04 (2006.01) C10M 133/06 (2006.01) C10M 145/12 (2006.01) C10M 145/14 (2006.01) C10M 145/16 (2006.01)

Patent

CA 2376637

A composition, comprising from about 20% to about 80% by weight of a diluent, prepared by reacting a mixture comprising: (A) an esterified carboxy- containing interpolymer, said interpolymer being derived from at least two monomers, (i) one of said monomers being at least one of an aliphatic olefin containing from 2 to about 30 carbon atoms and a vinyl aromatic monomer and (ii) the other of said monomers being at least one alpha, beta unsaturated acylating agent, and having, before esterification, Mn determined by gel permeation chromatography ranging from about 8,000 to about 350,000, wherein from about 80% to about 99% of the carboxylic groups of said interpolymer are esterified, wherein from about 80 to about 100% of the ester groups contain from 8 to about 23 carbon atoms and from 0 to about 20% of the ester groups contain from 2 to 7 carbon atoms, and (B) a hydrocarbyl substituted carboxylic acid or functional derivative thereof wherein the hydrocarbyl group comprises from about 10 to about 400 carbon atoms, with (C) an amine having an average of more than 1 condensable N-H groups, wherein from about 0 to about 95% of the diluent is present during the reacting and the product obtained from said reacting is further combined with additional diluent such that the total diluent comprises from about 20% to about 80% by weight of the total weight of the composition.

L'invention concerne une composition contenant environ 20 % à environ 80 % en poids d'un diluant, préparée par réaction d'un mélange contenant (A) un interpolymère estérifié contenant un carboxy, ledit interpolymère étant dérivé d'au moins deux monomères (i) un desdits monomères étant au moins une oléfine aliphatique contenant 2 à environ 30 atomes de carbone et un monomère vinylaromatique et (ii) le second desdits polymères étant au moins un agent acylant .alpha.-.beta. insaturé et ayant, avant estérification, un Mn déterminé par chromatographie par perméation sur gel allant d'environ 8 000 à environ 350 000, environ 80 % à environ 99 % des groupes carboxyliques dudit interpolymère étant estérifiés, environ 80 % à environ 100 % des groupes ester contenant 8 à environ 23 atomes de carbone et 0 à environ 20 % des groupes ester contenant 2 à 7 atomes de carbone, et (B) un acide carboxylique à substitution hydrocarbyle ou un dérivé fonctionnel de celui-ci, dans lequel le groupe hydrocarbyle contient environ 10 à environ 400 atomes de carbone, avec (C) une amine ayant une moyenne de plus de un groupe N-H condensable, dans laquelle environ 0 à environ 95 % du diluant est présent pendant la réaction et le produit obtenu de ladite réaction est à nouveau combiné à un diluant additionnel de manière que le diluant total constitue environ 20 % à environ 80 % en poids du poids total de la composition.

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