Lubricants containing olefin copolymer and acrylate copolymer

Details Lubricants containing olefin copolymer and acrylate copolymer Lubricants containing olefin copolymer and acrylate copolymer

C - Chemistry, Metallurgy

10

M

C10M 157/04 (2006.01) C08L 23/02 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01) C08L 33/06 (2006.01) C08L 33/08 (2006.01) C08L 33/10 (2006.01) C10M 143/00 (2006.01) C10M 143/02 (2006.01) C10M 143/10 (2006.01) C10M 143/14 (2006.01) C10M 145/14 (2006.01) C10M 149/04 (2006.01) C10M 149/06 (2006.01) C10M 149/10 (2006.01) C10M 157/00 (2006.01) C10M 167/00 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2443902

A lubricating oil composition comprising an oil of lubricating viscosity and a total of from about 1 to about 50% by weight of copolymers comprising (A) at least one ethylene-aliphatic olefin copolymer wherein the aliphatic olefins contain from 3 to about 24 carbon atoms, said copolymer (A) having Mn ranging from about 600 to about 5000, and (B) at least one copolymer comprising units derived from alkyl acrylate ester monomers containing from 2 to about 25 carbon atoms in the ester group, and optionally, from about 0.1% to about 20% by weight of at least one member of the group consisting of vinyl aromatic monomers and nitrogen-containing vinyl monomers. said copolymer (B) having Mn ranging from about 10,000 to about 350,000, wherein the weight ratio of (A):(B) ranges from about 99:1 to about 1:99.

L'invention concerne une composition d'huile lubrifiante contenant une huile de viscosité lubrifiante et un total d'environ 1 à environ 50 % en poids de copolymères contenant (A) au moins un copolymère d'éthylène-oléfines aliphatiques dans lequel les oléfines aliphatiques contiennent 3 à environ 24 atomes de carbone, ledit copolymère (A) présentant une valeur M¿n? allant d'environ 600 à environ 5000, et (B) au moins un copolymère contenant des unités dérivées de monomères d'esters d'acrylate d'alkyle contenant 2 à environ 25 atomes de carbone dans le groupe ester, et facultativement, environ 0,1 à environ 20 % en poids d'au moins un élément du groupe constitué de monomères vinyliques aromatiques et de monomères vinyliques contenant de l'azote, ledit copolymère (B) ayant une valeur M¿n? allant d'environ 10 000 à environ 350 000, le rapport pondéral de (A):(B) s'établissant entre environ 99:1 et environ 1:99.

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