| abstract |
Step (1): The organic crystal nucleating agent has a viscosity at 23 ° C. while having a weight average molecular weight of 150 to 600 and a carboxylic acid ester having a viscosity of 1 to 500 mPa · s at 23 ° C. and / or a weight average molecular weight of 150 to 600. Obtaining a micronized organic nucleating agent composition by wet grinding in the presence of a phosphate ester having a 1 to 500 mPa · s, and Process (2): The process of melt-kneading the raw material for polylactic acid resin compositions containing the refined organic crystal nucleating agent composition and polylactic acid resin obtained at the process (1), Method for producing a polylactic acid resin composition comprising a. The polylactic acid resin composition obtained by the production method of the present invention can be suitably used for various industrial purposes such as daily necessities, home appliance parts, packaging materials for home appliance parts, automobile parts, and the like. |