POLYLACTIC ACID RESIN COMPOSITION, MOLDED BODY THEREOF AND POLYLACTIC ACID COMPOUND
申请人:Mitsui Chemicals, Inc.
公开号:EP2050789A1
公开(公告)日:2009-04-22
An object of the present invention is to provide a resin composition having increased heat resistance (high crystallinity) and transparency without impairing rigidity which a polylactic acid resin inherently has, a molded article composed of the resin composition and a novel polylactic acid compound used in the resin composition. A polylactic acid resin composition of the present invention contains a linear polylactic acid compound (A) having a moiety represented by the formula (1): -X1-R1-X2- and having a weight average molecular weight (Mw) of 5,000 to 500,000. In addition, in the formula (1), X1 and X2 each independently represent an oxygen atom, a sulfur atom or an NH group, R1 represents a divalent group containing at least one aromatic group or aliphatic group, and the hydrocarbon group may contain an oxygen atom, a nitrogen atom or a sulfur atom.
本发明的目的是提供一种树脂组合物,该树脂组合物具有更高的耐热性(高结晶度)和透明性,同时不损害聚乳酸树脂固有的刚性,还提供一种由该树脂组合物和用于该树脂组合物的新型聚乳酸化合物组成的模塑制品。本发明的一种聚乳酸树脂组合物含有线性聚乳酸化合物(A),其分子式为(1):-X1-R1-X2-,其重量平均分子量(Mw)为 5,000 至 500,000。此外,在式 (1) 中,X1 和 X2 各自独立地代表氧原子、硫原子或 NH 基团,R1 代表含有至少一个芳香族基团或脂肪族基团的二价基团,烃基可能含有氧原子、氮原子或硫原子。