METHOD FOR PRODUCING BLOCK COPOLYMER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a block copolymer, by which the polyester-based block copolymer having an excellent block property can easily be obtained. SOLUTION: This method for producing the block copolymer comprises reacting an aromatic polyester with a block copolyester represented by formula (1): (X-Y)n[X is an aliphatic polyester segment; Y is an aromatic polyester segment; (n) is an integer of≥2] and having a reduced viscosity of 0.7 to 10 dL/g in a melted state. COPYRIGHT: (C)2004,JPO&NCIPI