Viscosity index improver composition

Details Viscosity index improver composition Viscosity index improver composition

C - Chemistry, Metallurgy

10

M

253/128

C10M 157/00 (2006.01)

Patent

CA 1064895

ABSTRACT OF THE DISCLOSURE: A composition suitable as a V.I. improver additive for lubricants comprising from 1 to 15% of a vinyl aromatic sequential block copolymer having an Mn in the range 25,000 to 125,000 and containing from 10 to 40% b.w. of the vinyl aromatic component, from 5 to 45% of a polybutene having an Mn in the range 5,000 to 60,000 and the remainder of the composition comprising a solvent neutral base oil, all percentages being by weight.

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