Copolymers

Details Copolymers Copolymers

1975-03-26

1976-11-16

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

C10M 116

Patent

active

039923100

ABSTRACT:
Copolymers useful as shear stable viscosity index improvers, are graft copolymers of polyisobutylene onto a polystyrene backbone. The copolymers are formed by the grafting of polyisobutylene onto the polystyrene backbone using Friedel Crafts catalysts.

REFERENCES:
patent: 2615004 (1952-10-01), Jasper et al.
patent: 2786032 (1957-03-01), Hollyday et al.
patent: 2814595 (1957-11-01), Beerbower et al.
patent: 2837496 (1958-06-01), Vandenberg
patent: 2876199 (1959-03-01), Wasson et al.
patent: 3448050 (1969-06-01), Young et al.
patent: 3524904 (1970-08-01), Baxter

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