公开(公告)号：US20220169787A1

公开(公告)日：2022-06-02

申请号：US17437194

申请日：2020-03-30

申请人： Covestro Intellectual Property GmbH & Co. KG

发明人： Rolf Bachmann ,  Antonio Ortiz ,  Josef Bartholomei ,  Marten Voelker ,  Jan Heijl

IPC分类号： C08G64/14 ,  C08G64/24

摘要： The present invention relates to a process for producing polycarbonate according to a phase boundary process, from at least one dihydroxydiaryl alkane, phosgene, at least one catalyst and at least one chain terminator, the process producing polycarbonate with a low proportion of oligomers and a low proportion of Di-chain terminator carbonate. The process according to the invention is characterized in that the chain terminator is added to the reaction system at a designated time.