| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a block copolyester for fibers, films and resins, having good block character with slight catalyst residues and no quality deterioration thereof through using a nitrogen-containing compound as a catalyst. <P>SOLUTION: The method for producing the block copolyester with high block degree composed of an aromatic polyester and an aliphatic polyester as blocks involves carrying out an transesterification reaction in the presence of the specific nitrogen-containing organic compound catalyst. <P>COPYRIGHT: (C)2003,JPO |
