LACTIC ACID-BASE RESIN COMPOSITIONS AND MOLDED ARTICLES MADE THEREOF

摘要

Lactic acid-base resin compositions comprising a mixture (A) of polylactic acid (a1) with an aliphatic polyester (a2) and an aliphatic block copolyester (B) having a polylactic acid segment with an aliphatic polyester segment, wherein (1)the above aliphatic block copolyester (B) contains from 20 to 80% by weight of the lactic acid component in terms of monomers; (2) the above aliphatic block copolyester (B)has a weight-average molecular weight of from 1,000 up to 60,000; and (3) the weight-average molecular weight of the polylactic acid segment is from 500 to 55,000 and the weight-average molecular weight of the aliphatic polyester segment is from 500 to 55,000.