Hydrogenated star-shaped polymer

Details Hydrogenated star-shaped polymer Hydrogenated star-shaped polymer

1977-01-24

1978-09-26

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252 59, 260880B, 526335, C08K 501

Patent

active

041169174

ABSTRACT:
A viscosity index-improver for lubricating oil compositions is disclosed. This viscosity index improver is a hydrogenated star-shaped polymer comprising a poly(poly-alkenyl coupling agent) nucleus and at least four polymeric arms linked to the nucleus wherein the arms are hydrogenated homopolymers and copolymers of conjugated dienes, hydrogenated copolymers of cojugated dienes and monoalkenyl arenes, or mixtures thereof.

REFERENCES:
patent: 3668125 (1972-06-01), Anderson
patent: 3700633 (1972-10-01), Wald
patent: 3700748 (1972-10-01), Winkler
patent: 3823203 (1974-07-01), DeLaMare
patent: 3827999 (1974-08-01), Crossland
patent: 3965019 (1976-06-01), St. Clair
patent: 3985830 (1976-10-01), Fetters

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