Method for producing thermoplastic polyester with low terminal carboxyl group content

摘要

The present invention is a method for producing a thermoplastic polyester by polycondensing a dihydroxy compound with a dicarboxylic acid or its ester or ester-forming derivative, wherein the alkali per kg polyester is calculated based on the alkali metal or alkaline earth metal. A method for producing a thermoplastic polyester comprising adding a metal compound or an alkaline earth metal compound in an amount of less than 0.1 mmol.