| abstract |
A polylactic acid composition composed of a polylactic acid resin (A) and an acrylic triblock copolymer (B), wherein (1) the acrylic triblock copolymer (B) is a polymer block (B1) having a glass transition temperature of 25 ° C or lower. It is a tree block body in which both the polymer block (B2a) and the polymer block (B2b) of which both glass transition temperatures are 60 degreeC or more are couple | bonded at both ends, (2) The said polymer block (B1) is a main structure which comprises the unit derived from an acrylic ester Unit, and the polymer block (B2a) and the polymer block (B2b) each use a methacrylic acid ester unit as the main structural unit, and (3) the weight average molecular weight of the polymer block (B2a) and the polymer block (B2b) All prepare polylactic acid compositions smaller than the weight average molecular weight of the polymer block (B1). The polylactic acid-based resin (A) and the acrylic triblock copolymer (B) may have a phase separation structure. |