Modified dispersant V.I. improver

Details Modified dispersant V.I. improver Modified dispersant V.I. improver

1989-10-13

1991-09-17

Willis, Prince E.

Compositions

Electrolytes for electrical devices

252 56R, 252 56D, 525 92, 525180, 525190, 525285, 525301, C10M14500

Patent

active

050492942

ABSTRACT:
Improved dispersant/VI improver luboil additives are produced by reacting a hydrogenated conjugated diene star polymer or block copolymer with an alpha, beta unsaturated carboxylic acid or derivative to form an activated star polymer, which is then reacted with a) an alkyl carboxylic acid and b) an alkylamine or alkane polyol, or with the preformed product of reactants a) and b).

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patent: 4557849 (1985-10-01), Eckert
patent: 4693838 (1987-09-01), Varma et al.
patent: 4849481 (1989-07-01), Rhodes et al.

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