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    POLYCARBONATE RESIN AND METHOD FOR PRODUCING SAME
    1.
    发明公开
    POLYCARBONATE RESIN AND METHOD FOR PRODUCING SAME 审中-公开

    公开(公告)号：EP3828222A1

    公开(公告)日：2021-06-02

    申请号：EP19840316.4

    申请日：2019-07-17

    申请人： MITSUBISHI GAS CHEMICAL COMPANY, INC.

    发明人： ISHIKAWA, Shun

    IPC分类号： C08G64/04 ,  C08G64/22

    摘要： The purpose of the present invention is to provide: a polycarbonate resin which has a narrow molecular weight distribution and in which the formation of low molecular weight oligomers is suppressed; and a method for producing the polycarbonate resin. According to the present invention, provided are a polycarbonate resin containing a structural unit represented by general formula (1), wherein the molecular weight distribution value (Mw/Mn) is 6.0 or less, and the content of oligomers having a molecular weight of less than 1,000 is suppressed to 0.50 mass% or less; and a method for producing the polycarbonate. (In general formula (1), R 1-26 represent hydrogen, fluorine, chlorine, bromine, iodine, a C1-9 alkyl group, a C6-12 aryl group, a CI-5 alkoxy group, a C2-5 alkenyl group, or a C7-17 aralkyl group.)

    METHOD FOR PRODUCING AQUEOUS SOLUTION OF ALKALI METAL SALT OF AROMATIC DIHYDROXY COMPOUND FROM WASTE AROMATIC POLYCARBONATE
    4.
    发明公开
    METHOD FOR PRODUCING AQUEOUS SOLUTION OF ALKALI METAL SALT OF AROMATIC DIHYDROXY COMPOUND FROM WASTE AROMATIC POLYCARBONATE 审中-公开
    METHOD FOR PRODUCING碱金属盐的水溶液中的芳族聚碳酸酯废料的芳香族二羟基

    公开(公告)号：EP1873135A4

    公开(公告)日：2008-06-04

    申请号：EP05734599

    申请日：2005-04-20

    申请人： TEIJIN CHEMICALS LTD

    发明人： OGASAWARA KAZUYOSHI

    IPC分类号： C07C37/52 ,  C07C37/66 ,  C07C37/72 ,  C07C37/82 ,  C07C39/16 ,  C08G64/22 ,  C08J11/16

    CPC分类号： C07C37/64 ,  C08G64/04 ,  C08J11/16 ,  C08J2369/00 ,  Y02W30/705 ,  C07C39/235

    摘要： A method for decomposing a waste aromatic polycarbonate by an aqueous solution of an alkali metal hydroxide and producing an aqueous solution of an alkali metal salt of an aromatic dihydroxy compound, which comprises (1) a dissolution step of dissolving the waste aromatic polycarbonate into a chlorinated hydrocarbon solvent, (2) a decomposition step of adding an aqueous solution of an alkali metal hydroxide to the resultant solution, to decompose the aromatic polycarbonate, (3) a re- dissolution step of adding water to the liquid decomposed product to dissolve solids, (4) a two-phase forming step of allowing the resultant liquid product from the previous step to stand, to thereby form an organic solvent phase (an organic phase) and an aqueous solution phase (water phase), and (5) a separation and recovery step of separating the water phase from the organic solvent phase and recovering the water phase. The above method allows an aqueous solution of a metal salt of an aromatic dihydroxy compound having high quality and thus being useful as a raw material for a polycarbonate to be produced from a waste aromatic polycarbonate, with a short decomposition time, at a low cost, and thus, advantageously from an industrial view point.

    PROCESS FOR PRODUCING POLYCARBONATE
    5.
    发明公开
    PROCESS FOR PRODUCING POLYCARBONATE 失效
    VERFAHREN ZUR HERSTELLUNG VON POLYCARBONAT

    公开(公告)号：EP0807657A4

    公开(公告)日：1998-10-21

    申请号：EP96901489

    申请日：1996-01-31

    申请人： IDEMITSU KOSAN CO

    发明人： KUZE SHIGEKI ,  TANAKA KENJI ,  SUGA KOUICHI ,  SEINO YOSHIKATSU ,  SHISHIKURA AKIHIRO ,  KUNISHI NORIYUKI

    IPC分类号： C08G64/22 ,  C08G64/24 ,  C08G64/30

    CPC分类号： C08G64/307 ,  C08G64/22 ,  C08G64/24

    摘要： A process for producing polycarbonate through transesterification using, as the polymerization catalyst: (1) a combination of a nitrogenous organic base compound and a quaternary phosphonium salt, (2) a tetraarylphosphonium salt having a specific structure or (3) a quaternary phosphonium salt having a specific structure bearing a branched alkyl group; and a process for producing polycarbonate comprising preparing a polycarbonate prepolymer by prepolymerization and subjecting the prepolymer to solid-phase polymerization using a quaternary phosphonium salt as the catalyst. According to these processes, a high-quality polycarbonate excellent in appearance, resistances to heat and hydrolysis and so on can be produced extremely efficiently.

    摘要翻译： 公开了通过酯交换反应生产聚碳酸酯的方法，该方法包括使用（1）含氮有机碱性化合物和季鏻盐的组合作为聚合催化剂，（2）具有特定化学结构的四芳基鏻盐 ，或（3）具有特定化学结构且含有支链烷基的季鏻盐; 和聚碳酸酯的制造方法，其特征在于，包括以下步骤：通过预聚合制备聚碳酸酯预聚物，然后通过使用季鏻盐作为催化剂，使所得预聚物以固相的状态聚合。 通过使用这些方法中的任一种，可以以极高的效率制造外观，耐热性，耐水解性等优异的高品质聚碳酸酯。