METHOD OF PRODUCING BLOCK COPOLYMER

摘要

PROBLEM TO BE SOLVED: To provide a method by which a polyester-based block copolymer having excellent blocking properties is readily obtainable. SOLUTION: The method of producing the block copolymer comprises reacting an aromatic polyester with a block copolyester represented by formula X-Y-X (X is an aliphatic polyester segment; Y is an aromatic polyester segment) in a molten state. COPYRIGHT: (C)2004,JPO