Viscosity index improver soluble in synthetic...

Details Viscosity index improver soluble in synthetic... Viscosity index improver soluble in synthetic...

C - Chemistry, Metallurgy

10

M

253/128

C10M 119/02 (2006.01) C08C 19/02 (2006.01) C08F 8/04 (2006.01) C10M 143/00 (2006.01)

Patent

CA 1228347

ABSTRACT OF THE DISCLOSURE Hydrogenated completely random conjugated diene/monovinylarene copolymers with a conjugated diene content above about 50 weight percent, monovinylarene content below about 50 weight percent, vinyl unsaturation (normalized) at least about 25 weight percent, block polymonovinylarene below about 5 weight percent, and molecular weight Mn in the range of about 30,000-200,000, are soluble in synthetic poly(.alpha.-olefin) lubricating oils providing therein effective viscosity index control, pour point, and shear loss at low concentrations.

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