Polymeric dispersant viscosity modifier composition

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 161/00 (2006.01)

Patent

CA 2566656

The present invention provides a composition containing: (a) an oil of lubricating viscosity; (b) an amine salt of a phosphorus compound; (c) a compound selected from the group consisting of:1) a polymeric dispersant viscosity modifier wherein the polymeric dispersant viscosity modifier excludes copolymers derived from (a) a nitrogen containing monomer; and (b) methacrylic acid esters containing from about 9 to about 25 carbon atoms in the ester group; 2) a polymeric dispersant viscosity modifier, a borated dispersant; and a sulphurised olefin; and 3) mixtures thereof. The invention further provides a process for preparing the composition and a method for improving oxidation cleanliness of surface.

La présente invention concerne une composition qui comprend ce qui suit: (a) une huile de viscosité lubrifiante; (b) un sel aminé d'un composé phosphoré; (c) un composé sélectionné dans le groupe constitué de: 1) un modificateur polymère de viscosité, ledit modificateur excluant les copolymères dérivés de ce qui suit (a) un monomère contenant de l'azote; et (b) des esters d'acide métacrylique comprenant entre environ 9 et environ 25 atomes de carbone dans le groupe d'esters; 2) un modificateur polymère de la viscosité de dispersants, un dispersant borique; et une oléfine sulfurée; et 3) leurs mélanges. L'invention concerne également un processus destiné à la préparation de la composition et un procédé pour améliorer la propreté de la surface par rapport à l'oxydation.

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