公开(公告)号：US5625027A

公开(公告)日：1997-04-29

申请号：US530907

申请日：1995-09-20

申请人： Shigeki Kuze ,  Ryozo Okumura ,  Seiji Takahashi

发明人： Shigeki Kuze ,  Ryozo Okumura ,  Seiji Takahashi

IPC分类号： C08G64/00 ,  C08G64/14 ,  C08G64/20 ,  C08G64/24 ,  B01J31/00

CPC分类号： C08G64/14 ,  C08G64/24

摘要： A process for producing a branched polycarbonate which comprises using a branching agent containing 200 ppm or less of sulfur; a branched polycarbonate which is prepared by the interfacial method and contains 1.0 ppm or less of residual sulfur as an impurity; and a branched polycarbonate which is prepared by the melting method and contains 2.0 ppm or less of residual sulfur as an impurity; are provided. When the branched polycarbonate is produced by the interfacial method, the branched polycarbonate produced does not show deterioration in heat stability or cause mold corrosion. When the branched polycarbonate is produced by the melting method, the branched polycarbonate produced does not show deterioration in heat stability or in color tone.

摘要翻译： 一种支链聚碳酸酯的制造方法，其特征在于，使用含有200ppm以下的硫的支化剂， 支链聚碳酸酯，其通过界面方法制备并含有1.0ppm或更少的残余硫作为杂质; 和通过熔融法制备并含有2.0ppm或更少的残留硫作为杂质的支化聚碳酸酯; 被提供。 当通过界面方法制造支化聚碳酸酯时，所生产的支化聚碳酸酯不会显示出热稳定性劣化或引起模具腐蚀。 当通过熔融法制造支化聚碳酸酯时，所生产的支化聚碳酸酯不会发生热稳定性或色调的劣化。