Process for preparing polycarbonates using iminoethers as catalysts
    51.
    发明授权
    Process for preparing polycarbonates using iminoethers as catalysts 失效
    使用亚氨基醚作为催化剂制备聚碳酸酯的方法

    公开(公告)号:US4268658A

    公开(公告)日:1981-05-19

    申请号:US107893

    申请日:1979-12-28

    申请人: Victor Mark

    发明人: Victor Mark

    CPC分类号: C08G64/24

    摘要: An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of an iminoether or its salt.

    摘要翻译: 通过在催化量的亚氨醚或其盐存在下使二元酚与碳酸酯前体反应来制备高分子量聚碳酸酯的界面聚合方法。

    Process for producing polycarbonate oligomers
    53.
    发明授权
    Process for producing polycarbonate oligomers 失效
    生产聚碳酸酯低聚物的方法

    公开(公告)号:US4122112A

    公开(公告)日:1978-10-24

    申请号:US804169

    申请日:1977-06-06

    CPC分类号: C08G64/00 C07C68/02

    摘要: A process for producing polycarbonate oligomers by the reaction of dihydroxy compounds with phosgene, which comprises contacting a mixture of a dihydroxy compound and an aqueous alkali solution with phosgene in the presence of an organic solvent in a tubular reactor to perform a first-stage reaction, introducing the first-stage reaction mixture into a tank-type reactor equipped with a stirrer and containing the aqueous alkali solution and a solution in the organic solvent of a polycarbonate oligomer formed by the reaction of the first-stage reaction product in a second stage, and performing the second-stage reaction while stirring the reaction mixture in the tank-type reactor and maintaining it at a predetermined temperature by sufficient removal of the heat of reaction.

    摘要翻译: 通过二羟基化合物与光气的反应制备聚碳酸酯低聚物的方法,该方法包括在有机溶剂存在下,将二羟基化合物和碱水溶液与光气的混合物在管式反应器中进行第一阶段反应, 将第一阶段反应混合物引入装有搅拌器并含有碱水溶液的罐式反应器中,并在第二阶段通过第一阶段反应产物的反应形成的聚碳酸酯低聚物的有机溶剂中的溶液, 并在搅拌槽式反应器中的反应混合物的同时进行第二阶段反应,并通过充分除去反应热将其保持在预定温度。