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Asymmetric triblock copolymer process for the preparation of the same lubricating oil and lubricating oil concentrate composition
Asymmetric triblock copolymer process for the preparation of the same lubricating oil and lubricating oil concentrate composition
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机译:不对称三嵌段共聚物的制备方法与相同的润滑油和润滑油浓缩物组合物
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摘要
The present invention includes asymmetric triblock copolymers which are used as viscosity index improvers in oil compositions formulated for high performance engines. The triblock copolymers have the block structure hydrogenated polyisoprene-polystyrene-hydrogenated polyisoprene wherein the ratio of the number average molecular weights of the first and second hydrogenated polyisoprene blocks is at least 4.
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