METHOD FOR MANUFACTURING POLYESTER FOR USE IN FILM, POLYESTER FOR USE IN FILM OBTAINED THEREFROM, AND FILM

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing such a polyester for use in films as is more excellent in the thermal stability and color tone of a polymer in comparison with conventional articles.;SOLUTION: The method for manufacturing a polyester for use in films, comprising esterifying or transesterifying a dicarboxylic acid or an ester-formable derivative thereof and a diol or an ester-formable derivative thereof, thereafter polycondensing it in the presence of a polycondensation catalyst, is characterized by adding a specific phosphorus compound thereto.;COPYRIGHT: (C)2009,JPO&INPIT