Nucleating agent for polylactic acid-based resins, polylactic acid-based resin composition, and polylactic acid-based resin molded article

Abstract

A dispersion-type crystal nucleating agent for a polylactic acid resin which, when used for a polylactic acid resin, can improve the crystallization temperature of a polylactic acid resin composition and the heat resistance of a polylactic acid resin molded article is provided. A polylactic acid resin composition and a polylactic acid resin molded article each containing the crystal nucleating agent are also provided. The crystal nucleating agent contains a metal salt of an alicyclic dicarboxylic acid, the alicyclic dicarboxylic acid being cyclohexane-1,2-dicarboxylic acid having at least one alkyl substituent directly bound to a cyclohexane ring, the metal salt being a calcium salt, a hydroxy aluminum salt, a disodium salt, or a dilithium salt, stereoisomers of the alkyl substituent on the cyclohexane ring of the alicyclic dicarboxylic acid and an oxycarbonyl group constituting the metal salt including a cis isomer at a molar ratio of 80.0% or more.

Dependencies are inferred from the claim text.