发明授权
US5460739A Star polymer viscosity index improver for oil compositions 失效
用于油组合物的星形聚合物粘度指数改进剂

Star polymer viscosity index improver for oil compositions
摘要:
The present invention includes star polymers which can be used as viscosity index improvers in oil compositions formulated for high performance engines. The star polymers have triblock copolymer arms of hydrogenated polyisoprene-polybutadiene-polyisoprene, which provide excellent low temperature performance in lubricating oils, and can be used in the presence of low pour point depressant concentrations.
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