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Poly(meth)acrylate-based viscosity index improver, lubricant additive and lubricant composition containing viscosity index improver
Poly(meth)acrylate-based viscosity index improver, lubricant additive and lubricant composition containing viscosity index improver
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机译:聚(甲基)丙烯酸酯基粘度指数改进剂,润滑剂添加剂和包含粘度指数改进剂的润滑剂组合物
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摘要
The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by the following formula (1), and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less.; ;[R1 represents hydrogen or a methyl group, and R2 represents a C1 to C36 alkyl group.]
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