申请人:Kureha Corporation
公开号:EP1980581A1
公开(公告)日:2008-10-15
A process for producing an aliphatic polyester through ring-opening polymerization of a cyclic ester, wherein a partial polymer in a molten state is continuously introduced into a twin-screw stirring device to continuously obtain a partial polymer in a solid pulverized state, the partial polymer is subjected to solid-phase polymerization, and the resultant polymer is melt-kneaded together with a thermal stabilizer to be formed into pellets. As a result, an aliphatic polyester of a high molecular weight and with little discoloration is produced efficiently.
一种通过环酯开环聚合生产脂肪族聚酯的工艺,其中将熔融状态的部分聚合物连续引入双螺杆搅拌装置,以连续获得固态粉碎状态的部分聚合物,对部分聚合物进行固相聚合,并将所得聚合物与热稳定剂一起熔融捏合成颗粒。这样,就能有效地生产出分子量高、褪色少的脂肪族聚酯。