Importance

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Abstract

A rubber-like polymer,

wherein a sum of a content C1 of a structure represented by the following formula (1) and a content C2 of a structure represented by the following formula (2) is 40 mol % or more and 60 mol % or less;a content C3 of a structure represented by the following formula (3) is 15 mol % or more and 60 mol % or less;a content C4 of a structure represented by the following formula (4) is 2 mol % or more and 25 mol % or less;a content S of an aromatic vinyl monomer unit is 4 mol % or more and 18 mol % or less;a weight average molecular weight measured by gel permeation chromatography (GPC) is 300,000 or more; anda modification ratio measured by column adsorption GPC is 60% by mass or more:

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First Claim