Lubricating compositions containing .alpha.-olefin polymers

Details Lubricating compositions containing .alpha.-olefin polymers Lubricating compositions containing .alpha.-olefin polymers

1992-07-16

1994-11-15

Pal, Asok

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

With nonhydrocarbon additive

585 4, 585 5, 585 12, 585 13, 252 9, C07C 226

Patent

active

053649940

ABSTRACT:
The invention deals with viscosity improvers which are .alpha.-olefin polymers and are particularly useful in lubricating compositions comprising (A) a liquid .alpha.-olefin polymer having a number average molecular weight from about 2,000 to about 100,000 and having derived from .alpha.-olefins having from about 4 to about 30 carbon atoms, provided further that (A) has a bimodal molecular weight distribution having (i) a peak molecular weight maximum at 2,000 to 5,000 for a lower molecular weight component and (ii) a peak molecular weight maximum at 50,000 to 75,000 for a higher molecular weight component; (B) an oil of lubricating viscosity and (C) at least one member selected from the group consisting of a friction modifier, a sulfurized olefin, an ash-producing detergent and, an ashless dispersant.

REFERENCES:
Smalheer & Smith "Lubricant Additives" (1967) The Lezius-Hills Co. Cleveland, Ohio pp. 1-11.
Kirk-Othmer "Encyclopedia of Chem. Technology", vol. 14 (1981), (John Wiley), pp. 484-501.

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