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    PROCESS FOR EFFICIENTLY PRODUCING AROMATIC POLYCARBONATE
    102.
    发明授权
    PROCESS FOR EFFICIENTLY PRODUCING AROMATIC POLYCARBONATE 有权
    法芳香族聚碳酸酯的高效生产

    公开(公告)号：EP1760107B1

    公开(公告)日：2011-02-16

    申请号：EP05751169.3

    申请日：2005-06-14

    申请人： Asahi Kasei Chemicals Corporation

    发明人： FUKUOKA, Shinsuke ,  HACHIYA, Hiroshi ,  MATSUZAKI, Kazuhiko;

    IPC分类号： C08G64/30 ,  C08G64/04

    CPC分类号： C08G64/205 ,  C08G64/307

    摘要： A process by which a high-quality and high-performance aromatic polycarbonate having no color and excellent mechanical properties can be stably produced for long from a molten prepolymer of an aromatic polycarbonate obtained from an aromatic dihydroxy compound and a diaryl carbonate, on an industrial scale of 1-50 tons per hour without using a large amount of an inert gas. The process, which is for producing an aromatic polycarbonate by the melt method, comprises absorbing a specific amount of an inert gas into a molten prepolymer of an aromatic polycarbonate obtained by the reaction of an aromatic dihydroxy compound with a diaryl carbonate and then polymerizing the prepolymer with a polymerizer of the guide contact flowing-down type having a specific structure. Thus, a high-quality and high-performance aromatic polycarbonate having no color and excellent mechanical properties can be stably produced on an industrial scale at an output of 1-50 tons per hour over a period as long as several thousands of hours, e.g., 5,000 hours, without causing fluctuations in molecular weight, etc.

    PROCESS FOR PRODUCTION OF POLYCARBONATE
    105.
    发明公开
    PROCESS FOR PRODUCTION OF POLYCARBONATE 审中-公开
    VERFAHREN ZUR HERSTELLUNG冯聚碳酸酯

    公开(公告)号：EP2236540A1

    公开(公告)日：2010-10-06

    申请号：EP08859191.2

    申请日：2008-12-10

    申请人： Mitsubishi Chemical Corporation

    发明人： FUJI, Michiaki ,  NAMIKI, Shingo ,  YAMAMOTO, Masaki

    IPC分类号： C08G64/30

    CPC分类号： C08G64/30 ,  Y02P20/582 ,  Y10T428/1352

    摘要： A subject for the invention is to provide a polycarbonate having excellent mechanical strength, heat resistance, a low refractive index, a large Abbe number, reduced birefringence, and excellent transparency. The invention relates to a polycarbonate characterized by being obtained by subjecting one or more dihydroxy compounds including a dihydroxy compound having at least one linking group -CH 2 -O-in the molecule thereof to melt polycondensation with a carbonic acid diester, and by having a reduced viscosity of from 0.40 dL/g to 1.70 and a formic acid content lower than 5 ppm by weight.

    摘要翻译： 本发明的主题是提供具有优异的机械强度，耐热性，低折射率，大的阿贝数，降低的双折射和优异的透明性的聚碳酸酯。 本发明涉及一种聚碳酸酯，其特征在于通过使一种或多种二羟基化合物（包括其分子中具有至少一个连接基团-CH 2 -O-的二羟基化合物）与碳酸二酯熔融缩聚得到， 比浓粘度为0.40dL / g至1.70，甲酸含量低于5ppm重量。

    PROCESS FOR PRODUCING POLYCARBONATE
    109.
    发明授权
    PROCESS FOR PRODUCING POLYCARBONATE 有权
    生产聚碳酸酯的方法

    公开(公告)号：EP1327665B1

    公开(公告)日：2009-05-27

    申请号：EP01967758.2

    申请日：2001-09-20

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC.

    发明人： YOSHIDA, Shu, c/o Mitsubishi Gas Chemical Co. Inc ,  TANAKA, Hiroaki, c/o Mitsubishi Gas Chem. Co. Inc

    IPC分类号： C08L69/00 ,  C08G64/30 ,  C08K5/42 ,  C08K5/51

    CPC分类号： C08G64/307 ,  C08G64/30 ,  C08G64/305

    摘要： A process for producing a polycarbonate, characterized by compounding 100 parts by weight of a polycarbonate obtained by subjecting a carbonic diester and a dihydroxy compound to melt polycondensation in the presence of an alkali metal and/or alkaline earth metal catalyst with 0.0001 to 0.1 part by weight of a phosphite compound represented by the following general formula (I): (I) wherein R represents hydrogen, C1-18 alkyl or aryl, or C1-8 hydroxyalkyl, provided that not both of the R's are hydrogen. By the process, a polycarbonate molding material can be obtained which has an excellent hue and is usable in a wide range of applications such as optical materials.

    摘要翻译： 1。一种聚碳酸酯的制造方法，其特征在于，在碱金属和/或碱土类金属催化剂的存在下，使碳酸二酯和二羟基化合物熔融缩聚而得到的聚碳酸酯100重量份中配合0.0001〜0.1重量份 （I）代表的亚磷酸酯化合物的重量：其中R代表氢，C1-18烷基或芳基或C1-8羟烷基，条件是两个R都不是氢。 通过该方法，可以获得具有优异色调的聚碳酸酯模塑材料，并且可用于广泛的应用如光学材料。

    PROCESS FOR PRODUCING AROMATIC POLYCARBONATE OF HIGH QUALITY
    110.
    发明公开
    PROCESS FOR PRODUCING AROMATIC POLYCARBONATE OF HIGH QUALITY 审中-公开
    用于生产芳香族聚碳酸酯高品质

    公开(公告)号：EP1760106A4

    公开(公告)日：2009-05-06

    申请号：EP05751047

    申请日：2005-06-14

    申请人： ASAHI KASEI CHEMICALS CORP

    发明人： YOKOTA KOSHIRO ,  HACHIYA HIROSHI

    IPC分类号： C08G64/30

    CPC分类号： C08G64/307

    摘要： A method for producing a high quality aromatic polycarbonate, which comprises subjecting to molten state polymerization a mixture of an aromatic dihydroxy compound and a diaryl carbonate in the presence of a catalyst, the mixture of the aromatic dihydroxy compound and the diaryl carbonate being obtained by a mixing step in which an aromatic dihydroxy compound and a catalyst, each being in a solid state and/or a liquid state, are added to a diaryl carbonate in a molten state in the presence of an inert gas, thereby dissolving the aromatic dihydroxy compound and the catalyst in the molten diaryl carbonate.