Dispersant and antioxidant additive and lubricating oil composit

Details Dispersant and antioxidant additive and lubricating oil composit Dispersant and antioxidant additive and lubricating oil composit

1990-12-17

1991-12-24

Howard, Jacqueline V.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525301, 525304, 525232, 252 50, 252 51, 252401, 252402, 252403, 252 475, 585 18, C10M10556, C08F25504

Patent

active

050753835

ABSTRACT:
An additive composition comprising a graft and amine-derivatized copolymer prepared from ethylene and at least one C.sub.3 to 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 to C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene, said copolymer having a number average molecular weight ranging from about 5,500 to 50,000 and having grafted thereon at least 1.8 molecules of a carboxylic acid acylating function per molecule of said copolymer and reacting said grafted copolymer with an amino-aromatic polyamine compound from the group consisting of an N-arylphenylenediamine, an aminocarbazole, an aminoindole, an amino-indazolinone, an aminomercaptotriazole, and an amino-perimidine to form said graft and amine-derivatized copolymer, and a lubricating oil composition containing same are provided.

REFERENCES:
patent: 4234435 (1980-11-01), Meinhardt et al.
patent: 4732942 (1988-03-01), Liu et al.
patent: 4735736 (1988-04-01), Chung
patent: 4738797 (1988-04-01), Halpern et al.
patent: 4764304 (1988-08-01), Kapuscinski et al.
patent: 4863623 (1989-09-01), Nalesnik

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