Process for preparing branched aromatic polycarbonates
    23.
    发明授权
    Process for preparing branched aromatic polycarbonates 有权
    制备支化芳族聚碳酸酯的方法

    公开(公告)号:US06437083B1

    公开(公告)日:2002-08-20

    申请号:US09683270

    申请日:2001-12-06

    IPC分类号: C08G6400

    CPC分类号: C08G64/307 C08G64/14

    摘要: A process for the production of a branched aromatic polycarbonate that includes adding a branching agent to a polycarbonate oligomer, and producing a branched aromatic polycarbonate having a melt index ratio greater than an aromatic polycarbonate produced from the polycarbonate oligomer without the addition of the branching agent. The branching agent has the formula (I): AGy  (I) wherein A is a C1-20 polymethylene, C2-20 alkylene or alkylidene, C5-36 cycloalkylene or cycloalkylidene, C6-36 arylene or alkylarylene, or C3-36 arylalkylene, wherein G is a monovalent C6-C30 hydrocarbon having at least one hydroxyl group bonded directly to an aromatic or cycloaliphatic ring and y is an integer greater than 2, and wherein each G may be the same or different.

    摘要翻译: 一种制备支化芳族聚碳酸酯的方法,其包括向聚碳酸酯低聚物中加入支化剂,以及制备熔融指数比大于由聚碳酸酯低聚物制备的芳族聚碳酸酯而不添加支化剂的支化芳族聚碳酸酯。 支化剂具有式(I):其中A是C 1-20多亚甲基,C 2-20亚烷基或亚烷基,C 5-36亚环烷基或亚环烷基,C 6-36亚芳基或烷基亚芳基或C 3-36芳基亚烷基,其中G是 具有至少一个羟基的一价C 6 -C 30烃直接键合到芳族或脂环族环上,y是大于2的整数,并且其中每个G可以相同或不同。