Dispersant-viscosity improvers for lubricating oil compositions

Compositions – Electrolytes for electrical devices

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575 64, 575 92F, 575381, 575382, C10M14500

Patent

active

055121926

ABSTRACT:
A composition of matter suitable for use as a dispersant-viscosity improver for lubricating oil compositions comprises the reaction product of reactants comprising
(a) an oil soluble, substantially hydrogenated, vinyl substituted aromatic-aliphatic conjugated diene block copolymer said copolymer having a number average molecular weight ranging from about 30,000 to about 300,000, grafted with an ethylenically unsaturated carboxylic acid or functional derivative thereof;
(b-1) at least one polyester containing at least one condensable hydroxyl group; and
(b-2) at least one polyamine having at least one condensable primary or secondary amino group, and optionally,
(c) at least one hydrocarbyl substituted carboxylic acid or anhydride.

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Ranney, M. W., "Lubricant Additives", Noyes Data Corp. (1973) pp. 119-136, month unknown.
Ranney, M. W., "Lubricant Additives, Recent Developments", Noyes Data Corp. (1978), pp. 151-159, month unknown.
Ranney, M. W., "Synthetic Oils and Additives for Lubricants, Advances Since 1977", Noyes Data Corp. (1980), pp. 119-150, month unknown.

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