Star-shaped dispersant viscosity index improver

Details Star-shaped dispersant viscosity index improver Star-shaped dispersant viscosity index improver

1977-05-11

1978-03-07

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

252560, 260880B, 260879, C10M 128, C08L 906, C08L 4700

Patent

active

040778932

ABSTRACT:
Lubricating oil additives having both dispersant and viscosity index-improving properties are prepared by reacting a selectively hydrogenated star-shaped polymer having at least four arms of polymers or copolymers of dienes and monoalkenyl arenes with an alpha-beta unsaturated carboxylic acid or derivative, and then reacting the resulting intermediate with an alkane polyol.

REFERENCES:
patent: 3694523 (1972-09-01), Rollman et al.
patent: 3943086 (1976-03-01), Schein et al.
patent: 4033888 (1977-07-01), Kiovsky
patent: 4033889 (1977-07-01), Kiovsky

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