Wear control with dispersants employing poly alpha-olefin polyme

Details Wear control with dispersants employing poly alpha-olefin polyme Wear control with dispersants employing poly alpha-olefin polyme

1997-11-12

1999-10-26

Howard, Jacqueline V.

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Heavy metal or aluminum in an organic phosphorus compound...

C10M16100

Patent

active

059728531

ABSTRACT:
A lubricating oil composition comprising oil, and an additive combination comprising a poly alpha-olefin polymer dispersant with a number average molecular weight above 2500, and a metal dihydrocarbyl dithiophosphate sufficient to yield a phosphorous content of up to 0.1 percent weight based on the total weight of the oil. The poly alpha-olefin polymer can be ethylene alpha-olefin copolymer such as ethylene-1-butene or ethylene-1-butene-hydrocarbyl polyamine. Preferably, the ethylene-1-butene-hydrocarbyl polyamine has a number average molecular weight of about 3300.

REFERENCES:
patent: 5277833 (1994-01-01), Song et al.
patent: 5631211 (1997-05-01), Nakagawa et al.
patent: 5681797 (1997-10-01), Lawate
patent: 5726134 (1998-03-01), Adams
patent: 5733852 (1998-03-01), Adams
patent: 5747596 (1998-05-01), Emert et al.

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