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    Phase boundary processes for preparing polycarbonates
    6.
    发明授权
    Phase boundary processes for preparing polycarbonates 有权
    制备聚碳酸酯的相边界法

    公开(公告)号：US07847051B2

    公开(公告)日：2010-12-07

    申请号：US12398243

    申请日：2009-03-05

    申请人： Wolfgang Ebert ,  Christian Kords ,  Rolf Bachmann ,  Lars Obendorf ,  Johan Vanden Eynde ,  Bert Ruytinx ,  Johann Seeba

    发明人： Wolfgang Ebert ,  Christian Kords ,  Rolf Bachmann ,  Lars Obendorf ,  Johan Vanden Eynde ,  Bert Ruytinx ,  Johann Seeba

    IPC分类号： C08G64/00 ,  C08G63/18

    CPC分类号： C08G64/24

    摘要： Continuous processes for preparing polycarbonates having a weight average molecular weight Mw, of 15,000 to 200,000 g/mol, the processes comprising reacting a dihydroxydiarylalkane and phosgene in the presence of a catalyst in a phase boundary process comprising: continuously dispersing in a disperser an organic phase comprising at least a portion of the phosgene and a solvent suitable for the polycarbonate and an aqueous phase comprising the dihydroxydiarylalkane, water and an alkali solution present in an amount of 1.5 to 2.5 moles per mole of the dihydroxydiarylalkane, to form a mixture; reacting the mixture in a first reactor with a residence time of less than 0.5 seconds; further reacting the mixture in a second reactor with addition of further alkali solution and, optionally, a chain terminator; and effecting further condensation in a third reactor with addition of further alkali solution and, optionally, a chain terminator, in the presence of the catalyst.

    摘要翻译： 用于制备重均分子量Mw为15,000至200,000g / mol的聚碳酸酯的连续方法，包括在相界过程中在催化剂存在下使二羟基二芳基烷烃和光气反应的方法包括：在分散机中连续分散有机相 包含至少一部分光气和适用于聚碳酸酯的溶剂和包含二羟基二芳基烷烃的水相，每摩尔二羟基二芳基烷烃存在的量为1.5至2.5摩尔的水和碱溶液形成混合物; 使混合物在第一反应器中反应，停留时间小于0.5秒; 在第二反应器中进一步使混合物反应，再加入另外的碱溶液和任选的链终止剂; 并在催化剂存在下，在第三反应器中进一步加入另外的碱溶液和任选的链终止剂。