Oil soluble ester pour point depressant additive for lubricants

Details Oil soluble ester pour point depressant additive for lubricants Oil soluble ester pour point depressant additive for lubricants

1983-12-23

1985-04-30

Metz, Andrew

Compositions

Electrolytes for electrical devices

C10M 128

Patent

active

045143145

ABSTRACT:
An oil soluble copolymer, useful as a pour point depressant for lubricating oils, is a C.sub.22 -C.sub.40, preferably C.sub.32 -C.sub.36, branched alkyl ester based polymer. These alkyl esters of copolymers are essentially free of olefinic unsaturation and have a number average molecular weight of from 1,000 to 40,000, preferably 2,000 to 15,000, optimally 2,000 to 8,000.
These alkyl ester copolymers are usefully admixed with lubricants in an amount of from 0.01 to 2 wt. % based on the total weight of the admixture and are of the class consisting of a C.sub.22 -C.sub.40 branched alkyl ester of a copolymer of a C.sub.2 to C.sub.20 1-olefin and maleic anhydride and di-(2-[C.sub.22 to C.sub.40 ] alkyl) fumarate-vinyl C.sub.1 -C.sub.4 alkylate e.g. acetate copolymer.

REFERENCES:
patent: 2655479 (1953-10-01), Munday et al.
patent: 2666746 (1954-01-01), Munday et al.
patent: 2721877 (1955-10-01), Popkin et al.
patent: 3729296 (1973-04-01), Miller
patent: 3765849 (1973-10-01), Ilnyckyj et al.
patent: 4151069 (1979-04-01), Rossi

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