Dispersant, VI improver, additive and lubricating oil compositio

Details Dispersant, VI improver, additive and lubricating oil compositio Dispersant, VI improver, additive and lubricating oil compositio

1990-02-09

1991-07-30

Willis, Prince E.

Compositions

Electrolytes for electrical devices

5253291, 5253292, 5253293, C10M10748, C10M15302

Patent

active

050358197

ABSTRACT:
A lubricant additive that imparts enhanced dispersancy and antioxidancy has been prepared by reacting a copolymer or terpolymer with an acrylating agent followed by treatment with a dialiphatic or aromatic phosphate. The copolymer is prepared from ethylene and at least one (C.sub.3 -C.sub.10) alpha-monoolefin and, optionally, a polyene selected from 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 having a number average molecular weight ranging from about 5,000 to about 500,000.

REFERENCES:
patent: 3522180 (1970-07-01), Sweeney
patent: 4026809 (1977-05-01), Lachowicz
patent: 4146489 (1983-11-01), Stambaugh
patent: 4239860 (1980-12-01), Hergenrother et al.
patent: 4299932 (1981-11-01), Hergenrother et al.
patent: 4340689 (1982-07-01), Joffrion
patent: 4459386 (1984-07-01), Grundmann
patent: 4780228 (1988-10-01), Gardiner

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