C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
253/113, 400/942
C08L 23/18 (2006.01) C08L 23/04 (2006.01) C10M 143/02 (2006.01) C10M 143/04 (2006.01)
Patent
CA 2034716
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 H2C = CHR1 wherein R1 is an alkyl group of from 1 to l8 carbon atoms, and wherein said polymer has a number average molecular weight of from above 20,000 to about 500,000, and an average of at least about 30% of the polymer chains contain terminal ethylidene unsaturation.
Borden Ladner Gervais Llp
Exxonmobil Chemical Patents Inc.
Struglinski Mark Joseph
LandOfFree
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