Viscosity index improver composition

Details Viscosity index improver composition Viscosity index improver composition

1976-05-06

1978-03-28

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

C10M 116

Patent

active

040813908

ABSTRACT:
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 M.sub.n 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 M.sub.n 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.

REFERENCES:
patent: 2697694 (1954-12-01), Shalit et al.
patent: 2996455 (1961-08-01), Brown et al.
patent: 3554911 (1971-01-01), Schiff et al.
patent: 3630905 (1971-12-01), Sorgo
patent: 3668125 (1972-06-01), Anderson
patent: 3775329 (1973-11-01), Eckert
patent: 3793200 (1974-02-01), Billings
patent: 3965019 (1976-06-01), St. Clair et al.
patent: 3994815 (1976-11-01), Coleman

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