Oleaginous compositions containing novel ethylene alpha-olefin p

Details Oleaginous compositions containing novel ethylene alpha-olefin p Oleaginous compositions containing novel ethylene alpha-olefin p

1994-05-20

1995-08-29

Pal, Asok

Chemistry of hydrocarbon compounds

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

Component of indefinite molecular weight greater than 150

252 52R, 252 52A, 585 12, C08F21016, C10M14102

Patent

active

054462215

ABSTRACT:
The present invention is directed to a lubricating oil composition exhibiting improved viscosity index comprising lubricating oil and a viscosity improving effective amount of ethylene alpha-olefin polymer comprising monomer units derived from ethylene and at least one alpha-olefin represented by the formula H.sub.2 C.dbd.CHR.sup.1 wherein R.sup.1 is an alkyl group of from 1 to 18 carbon atoms, wherein said polymer has a number average molecular weight of from above 25,000 to about 500,000, wherein an average of at least about 30 percent of the polymer chains contain terminal ethenylidene unsaturation, and wherein said polymer is prepared in the presence of a catalyst system comprising at least one metallocene and an alumoxane compound.

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