Viscosity index improver soluble in synthetic poly(.alpha.-olefi

Details Viscosity index improver soluble in synthetic poly(.alpha.-olefi Viscosity index improver soluble in synthetic poly(.alpha.-olefi

1981-12-16

1983-11-29

Howard, Jacqueline V.

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

Component of indefinite molecular weight greater than 150

252 327E, 252 515A, C10M 118

Patent

active

044182341

ABSTRACT:
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 M.sub.n 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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