| 摘要 |
An object of the present invention is to provide a softening agent for a thermoplastic resin that gives flexibility, impact-resistance, etc. to a thermoplastic resin. The present invention provides the following (1) to (3) etc. (1) A softening agent for a thermoplastic resin comprising polyvinyl ether. (2) The softening agent according to the above (1), wherein the polyvinyl ether is polyvinyl ether having a structural unit represented by the general formula (I): (wherein R1 is a hydrogen atom or lower alkyl, and R2 is substituted or unsubstituted lower alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl). (3) The softening agent according to the above (1) or (2), wherein the weight-average molecular weight of the polyvinyl ether is 1,000 to 3,000,000.
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