专利名称：Viscosity index improver composition发明人：Adrian Richardson申请号：US05/683727申请日：19760506公开号：US04081390A公开日：19780328
摘要：A composition suitable as a V.I. improver additive for lubricants comprising from1 to 15% of a vinyl aromatic sequential block copolymer having an M.sub.n in the range25,000 to 125,000 and containing from 10 to 40% b.w. of the vinyl aromatic component,from 5 to 45% of a polybutene having an M.sub.n in the range 5,000 to 60,000 and theremainder of the composition comprising a solvent neutral base oil, all percentagesbeing by weight.
申请人：OROBIS LIMITED
代理机构：Brooks, Haidt, Haffner & Delahunty
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