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    Method for preparing block polyphenylene ether-polycarbonates
    4.
    发明公开
    Method for preparing block polyphenylene ether-polycarbonates 失效
    Verfahren zur Herstellung von Polyphenylentherther-聚碳酸封端复合物。

    公开(公告)号：EP0317773A2

    公开(公告)日：1989-05-31

    申请号：EP88117735.6

    申请日：1988-10-25

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Evans, Thomas Lane ,  Shea, Timothy John ,  Wasserman, Carol Barbara ,  Campbell, John Robert

    IPC分类号： C08G63/62 ,  C08G65/48

    CPC分类号： C08G64/183 ,  C08G65/485 ,  Y10S525/905

    摘要： Block polyphenylene ether-polycarbonates are prepared by blending a mixture of at least one polyphenylene ether wherein all phenolic end groups are in the free phenol form; at least one cyclic polycarbonate oligomer, preferably an oligomer mixture; and a catalyst for conversion of cyclic polycarbonates to linear polycarbonates; and heating said mixture to polymerization temperature. The preferred catalysts are phenoxides, salts of polycarbonate oligomers and tetraphenylborate salts. The method may be conducted in the melt or in solution, and is adaptable for employment in reactive processing operations.

    摘要翻译： 嵌段聚苯醚 - 聚碳酸酯通过共混至少一种聚苯醚的混合物制备，其中所有酚端基都是游离酚形式; 至少一种环状聚碳酸酯低聚物，优选低聚物混合物; 和用于将环状聚碳酸酯转化成线性聚碳酸酯的催化剂; 并将所述混合物加热至聚合温度。 优选的催化剂是苯氧化物，聚碳酸酯低聚物的盐和四苯基硼酸盐。 该方法可以在熔体或溶液中进行，并且适用于反应处理操作中的使用。

    Method for preparing siloxane-carbonate block copolymers
    6.
    发明公开
    Method for preparing siloxane-carbonate block copolymers 失效
    一种用于硅氧烷的制备和carbonatenthaltenden嵌段共聚物的过程。

    公开(公告)号：EP0205012A2

    公开(公告)日：1986-12-17

    申请号：EP86107043.1

    申请日：1986-05-23

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Evans, Thomas Lane

    IPC分类号： C08G77/42

    CPC分类号： C08G77/448 ,  C08G64/186

    摘要： Siloxane-carbonate block copolymers are prepared by reacting (A) at least one siloxane compound with (B) at least one polycarbonate compound, one of reagents A and B being anionic and the other being reactive with nucleophiles. The siloxane compound is preferably a linear chlorosilane- terminated polysiloxane, a cyclic polysiloxane or a "living" polysiloxane anion. The polycarbonate composition may be a cyclic polycarbonate oligomer composition, preferably an oligomer mixture, or may be prepared by the reaction of such an oligomer composition with a polycarbonate formation catalyst such as tetramethylammonium tetraphenylborate.

    Redistribution of organic polycarbonate compositions
    9.
    发明公开
    Redistribution of organic polycarbonate compositions 失效
    重新分配von organischen Polycarbonatzusammensetzungen。

    公开(公告)号：EP0595608A1

    公开(公告)日：1994-05-04

    申请号：EP93308549.0

    申请日：1993-10-27

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Campbell, Allen James ,  Dardaris, David Michel ,  Dardaris, David Michel ,  McCloskey, Patrick Joseph ,  Evans, Thomas Lane

    IPC分类号： C08G64/42

    CPC分类号： C08G64/42

    摘要： A process for the redistribution of an organic polycarbonate composition. The process involves melt equilibrating a starting polycarbonate composition (which may be a single polycarbonate or a mixture of polycarbonates, and may be or include recycled polycarbonate) having an initial weight average molecular weight in the presence of a carbonate redistribution catalyst under conditions such that a redistributed polycarbonate composition is formed having a weight average molecular weight different from, and typically lower than, the initial weight.

    摘要翻译： 一种有机聚碳酸酯组合物再分配的方法。 该方法包括在碳酸酯再分散催化剂的存在下，使起始聚碳酸酯组合物（其可以是聚碳酸酯的单一聚碳酸酯或聚碳酸酯的混合物，并且可以是或包括再循环的聚碳酸酯）在起始重均分子量存在下熔融平衡， 形成重新分布的聚碳酸酯组合物，其重均分子量不同于，通常低于初始重量。