Lubricating compositions for automotive gears

Details Lubricating compositions for automotive gears Lubricating compositions for automotive gears

C - Chemistry, Metallurgy

10

M

C10M 111/04 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2537311

The present invention comprises novel lubricating compositions, automotive gear lubricating compositions, and fluids useful in the preparation of finished automotive gear lubricants and finished gear oils, and methods of preparation thereof. One embodiment of the present invention comprises a lubricating composition comprising a blend of a PAO having a viscosity of greater than or equal to about 40 cSt. at 100 ~C and less than or equal to about 1,000 cSt. at 100 ~C and an ester having a viscosity of less than or equal to about 2.0 cSt. at 100 ~C, wherein said blend of said PAO and said ester has a viscosity index greater than or equal to the viscosity index of the PAO.

La présente invention porte sur de nouvelles compositions lubrifiantes, sur des compositions lubrifiantes pour engrenages automobiles et sur des fluides utilisés dans la préparation de lubrifiants de qualité fine pour engrenages automobiles et des huiles de qualité fine pour engrenages automobiles et sur leur procédé de préparation. Selon une forme d'exécution, l'invention comprend une composition lubrifiante comprenant un mélange d'une polyalphaoléfine (PAO) dont la viscosité est égale ou supérieure à environ 40 cSt. à 100 ·C et inférieure ou égale à environ 1,000 cSt. à100 ·C, et d'un ester dont la viscosité est inférieure ou égale à environ 2.0 cSt. à 100 ·C, le mélange de la polyalphaoléfine et de l'ester ayant un indice de viscosité égal ou supérieur à l'indice de viscosité de la PAO.

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