Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Stuart Briggs0
Chin Chu0
Date of Patent
January 16, 2007
0Patent Application Number
106112310
Date Filed
July 1, 2003
0Patent Primary Examiner
Patent abstract
A polymer suitable for use as a viscosity index improver for lubricating oil compositions, which is at least one, at least partially hydrogenated linear or star-shaped random copolymer of isoprene and butadiene, in which at least 70 wt. % of the butadiene is incorporated into the polymer as 1,4 units and the weight ratio of isoprene addition product to butadiene addition product in the copolymer is in a range of from about 90:10 to about 70:30.
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