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1. 发明申请

WO03008481A8 PROCESS FOR PREPARING POLYCARBONATE AND APPARATUS FOR PREPARING POLYCARBONATE 审中-公开
标题翻译：制备聚碳酸酯的方法和制备聚碳酸酯的方法
公开(公告)号：WO03008481A8
公开(公告)日：2004-02-26
申请号：PCT/US0216826
申请日：2002-05-23
申请人： GEN ELECTRIC
发明人： CELLA JAMES ANTHONY , SHIMODA TOMOAKI , KIMURA TAKATO , ZIRKZEE HENDRICUS FRANCISCUS , IKEDA AKIO , TAMADA KEN , BRACK HANS-PETER , KARLIK DENNIS , PRADA LINA
IPC分类号： C08G64/42 , C08G64/00 , C08G64/14 , C08G64/20 , C08G64/30 , C08G64/06 , C08G64/04
CPC分类号： C08G64/14 , C08G64/205 , C08G64/307 , C08G64/42
摘要： A process for preparing an end-capped polycarbonate comprises melt reacting an aromatic dihydroxy compound, a carbonic acid diester, and optionally a catalyst in a prepolymerization vessel 4a/4b to form a polycarbonate product; transferring the polycarbonate product from the prepolymerization vessel 4a/ab; mixing the polycarbonate product with an end-capping agent under hermetic seal at a pressure of at least about 76 mm Hg; and transferring the polycarbonate product and en-capping agent mixture to a postpolymerization vessel 9 to endcap the polycarbonate product. An apparatus for preparing an end-capped polycarbonate comprises a prepolymerization vessel 4a/4b having and inlet and an outlet; a postpolymerization vessel 9 having an inlet and an outlet; a mixer in fluid communication with the outlet of the prepolymerization vessel 4a/4b and the inlet of the postpolymerization vessel 9; and a charging port through which an end-capping agent is charged to the mixer, wherein the mixer is hermetically sealed at greater than or equal to 760 mm Hg.
摘要翻译：制备端封聚碳酸酯的方法包括在预聚合容器4a / 4b中使芳族二羟基化合物，碳酸二酯和任选的催化剂熔融反应以形成聚碳酸酯产物; 从预聚合容器4a / ab转移聚碳酸酯产物; 在至少约76mm Hg的压力下，在气密密封下将聚碳酸酯产物与封端剂混合; 并将聚碳酸酯产品和包封剂混合物转移到后聚合容器9中以端盖聚碳酸酯产品。用于制备端盖聚碳酸酯的装置包括具有入口和出口的预聚合容器4a / 4b; 具有入口和出口的后聚合容器9; 与预聚合容器4a / 4b的出口和后聚合容器9的入口流体连通的混合器; 和一个充气口，通过该充气口将封端剂装入混合器中，其中混合器以大于或等于760mm Hg气密密封。

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