PROCESS FOR PRODUCING A POLYESTER, A POLYESTER AND ITS USE

摘要

RHONE-POULENC VISCOSUISSE SA PCT 9122 In a process for antimony-free preparation of a polyester, after transesterification using a manganese catalyst, said catalyst is blocked by means of a phosphorus compound in a P/Mn molar ratio of < 1. 10100 ppm of Ge are additionally used as polycondensation mixed catalyst. The resulting antimony-free polyester is suitable for the production of bottles, sheets and filaments.