Viscosity-index improver

Details Viscosity-index improver Viscosity-index improver

C - Chemistry, Metallurgy

08

F

C08F 297/02 (2006.01) C08F 8/04 (2006.01) C08F 8/30 (2006.01) C08F 8/32 (2006.01) C08F 297/04 (2006.01) C08L 53/00 (2006.01) C10M 143/10 (2006.01) C10M 143/12 (2006.01) C10M 145/08 (2006.01) C10M 145/14 (2006.01) C10M 149/06 (2006.01) C10M 157/00 (2006.01) C10M 157/04 (2006.01)

Patent

CA 2111789

The present invention provides polymers comprising polymerised blocks of a hydrogenated conjugated dime (B), a vinylarene (A), and a methacrylate (M) or an amide or imide derivative thereof, wherein the polymer is a mixture of first molecules having a polymerised block structure B-A-M and second molecules having a coupled block structure B-A-M-A-B; a process for their preparation; lubricating oil compositions containing them; and their use as viscosity-index improver additives.

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