Patent ID: 6756331
Filing Date: 2004-06-29
Classification: C08L,D01F,Y10T

Abstract:
A lactic acid-based resin composition comprising a mixture of a mixture (A) of polylactic acid (a1) and an aliphatic polyester (a2), and an aliphatic block co-polyester (B) having a polylactic acid segment and an aliphatic polyester segment, wherein the aliphatic block co-polyester (B) satisfies all the following conditions (1) to (3):(1) it contains a lactic acid component in an amount of from 20 to 80 wt % in terms of monomer, (2) it has a weight average molecular weight of 1,000 or more and less than 60,000, and (3) it has a weight average molecular weight of the polylactic acid segment of from 500 to 55,000 and a weight average molecular weight of the aliphatic polyester segment of from 500 to 55,000.