Gear oil compositions

Details Gear oil compositions Gear oil compositions

C - Chemistry, Metallurgy

10

M

C10M 143/12 (2006.01)

Patent

CA 2052292

The invention provides gear oil compositions comprising a base oil and a hydrogenated star polymer comprising at least four arms, each arm comprising, before hydrogenation, polymerised conjugated diene monomer units and having a weight average molecular weight in the range of from 3,000 to 15,000; a method of preparing said compositions; and the use of said hydrogenated star polymers as viscosity index improver additives in gear oil compositions.

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