Improved viscosity modifiers for lubricant compositions

Details Improved viscosity modifiers for lubricant compositions Improved viscosity modifiers for lubricant compositions

C - Chemistry, Metallurgy

10

M

C10M 143/00 (2006.01) F16N 15/00 (2006.01)

Patent

CA 2514499

A lubricant composition method of using the lubricant composition. The lubricant composition contains a base oil of lubricating viscosity and from about 5 to about 30 percent by weight of an additive comprising a shear stable olefin copolymer derived from a copolymer having a number average molecular weight ranging from about 50,000 to about 250,000. The shear stable olefin copolymer has a shear stability index of less than about 40, a polydispersity of not more than about 1.5, and a thickening efficiency of greater than about 1.8, and provides viscosity index improving properties to the lubricant composition.

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