Dispersant, VI improver and antioxidant additive, and lubricatin

Details Dispersant, VI improver and antioxidant additive, and lubricatin Dispersant, VI improver and antioxidant additive, and lubricatin

1991-05-22

1992-11-03

McAvoy, Ellen

Compositions

Electrolytes for electrical devices

252401, 525259, 525285, 525301, 5253317, 5253319, 5253336, 525377, C10M14906, C08F21016, C08F22052

Patent

active

051604469

ABSTRACT:
An additive reaction product prepared by the steps comprising reacting a copolymer selected from the group consisting of ethylene copolymers prepared from ethylene and at least one C.sub.3 -C.sub.10 alpha-monoolefin and, optionally, a polyene selected fron non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 -C.sub.10 alpha-monoolefin, and from about 0 to 15 mole percent of said polyene and block copolymers prepared from styrene and a diene monomer having from 4 to 6 carbon atoms, said copolymer being a number average molecular weight ranging from about 25,000 to 300,000, with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function with their structure; reacting said reaction intermediate in with an unsaturated hydrocarbyl amine to form an imide reaction product; and reacting said imide reaction product with a nitroso compound, and a lubricating oil compositon containing same.

REFERENCES:
patent: 4160739 (1979-07-01), Stambaugh et al.
patent: 4219432 (1980-08-01), Girgenti et al.
patent: 4557847 (1985-12-01), Gutierrez et al.
patent: 4735736 (1988-04-01), Chung
patent: 4948524 (1990-08-01), Kapuscinski et al.
patent: 4973412 (1990-11-01), Migdal et al.
patent: 5112508 (1992-05-01), DeRosa et al.

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