POLY(METH)ACRYLATE-BASED VISCOSITY INDEX IMPROVER, AND LUBRICATING OIL ADDITIVE AND LUBRICATING OIL COMPOSITION CONTAINING VISCOSITY INDEX IMPROVER

PROBLEM TO BE SOLVED: To provide a viscosity index improver exhibiting a high shear stability, and to provide a lubrication oil additive and a lubricating oil composition containing the viscosity index improver.SOLUTION: There is provided a poly(meth)acrylate-based viscosity index improver which has...

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Bibliographic Details
Main Authors TAKAGI AKIRA, UENO RYUICHI, TAGAWA KAZUO, MATSUDA HIROMITSU
Format Patent
LanguageEnglish
Japanese
Published 22.01.2015
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Summary:PROBLEM TO BE SOLVED: To provide a viscosity index improver exhibiting a high shear stability, and to provide a lubrication oil additive and a lubricating oil composition containing the viscosity index improver.SOLUTION: There is provided a poly(meth)acrylate-based viscosity index improver which has a core part and three or more arm parts which are composed of a polymer chain containing a structural unit represented by the formula (1) and in which one end of the polymer chain is bonded to the core part, where the Mw is 100000 or more and the ratio Mw/Mn is 1.6 or less. 【課題】高いせん断安定性を示す粘度指数向上剤、並びに該粘度指数向上剤を含有する潤滑油添加剤及び潤滑油組成物を提供する。【解決手段】コア部と、式(1)で表される構造単位を含む重合鎖からなり且つ該重合鎖の一端がコア部に結合しているアーム部の3つ以上と、を有し、Mwが100,000以上であり、Mw/Mnが1.6以下である、ポリ(メタ)アクリレート系粘度指数向上剤。【選択図】なし
Bibliography:Application Number: JP20130142035