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    Polycarbonates
    1.
    发明公开
    Polycarbonates 失效
    聚碳酸酯。

    公开(公告)号：EP0249963A2

    公开(公告)日：1987-12-23

    申请号：EP87108700.3

    申请日：1987-06-16

    申请人： IDEMITSU KOSAN COMPANY LIMITED

    发明人： Shigematsu, Kazuyoshi ,  Nakagawa, Takashi ,  Sakamoto, Shuji

    IPC分类号： C08G64/04

    CPC分类号： C07C317/00 ,  C07C39/16 ,  C07C43/23 ,  C07C43/295 ,  C08G64/06

    摘要： A polycarbonate polymer containing repeating units epresented by the following general formula
    wherein: X is selected from single bond,-O-,-S-,-SO 2 -,
    wherein:

    R 1 and R 2 are each independently selected from hydrogen atom; alkyl radical of 1 to 6 carbon atoms; cycloalkyl radical of 5 to 6 carbon atoms;
    wherein
    is an integer having a value of from 0 to 3; phenyl radicals substituted at para position by a substituent seleced from alkoxy radicals of 1 to 5 carbon atoms, phenoxy radicals, or halogen radicals; or p-biphenylyl radical, -(CH 2 )- q wherein q is an integer having a value of from 2 to 10; or
    wherein r is an integer having a value of from 4 to 8, and having a reduced viscosity [ηsp/c] of at least 0.2 dl/g as measured in methylene chloride at a concentration of 0.5 g/dl at 20 °C.

    Such polycarbonates exhibit excellent optical properties such as high birefringence, and are useful as materials for optical devices.
    Also, a process for preparing the polycarbonates and novel dihydric phenols which can be used as materials for the polycarbonates are disclosed.

    摘要翻译： 含有由以下通式表示的重复单元的聚碳酸酯聚合物其中：X选自单键，-O - ， - S-，-SO 2 - ，CHEM，其中：R 1和R 2， 各自独立地选自氢原子：1至6个碳原子的烷基; 5至6个碳原子的环烷基; 其中p是0至3的整数，在对位被取代自1-5个碳原子的烷氧基的取代基取代的苯基，苯氧基或卤素基; 或对联苯基， - （CH 2）-q其中q是具有2至10的整数; 或，其中r是具有4至8的整数，并且在二氯甲烷中以0.5g / dl的浓度测量的具有至少0.2dl / g的比浓粘度[η/ s]为 20℃。这种聚碳酸酯表现出优异的光学性能，例如高双折射性，并且可用作光学器件的材料。 另外，公开了可用作聚碳酸酯材料的聚碳酸酯和新型二元酚的制备方法。

    Polycarbonates
    2.
    发明公开
    Polycarbonates 失效
    聚碳酸酯

    公开(公告)号：EP0249963A3

    公开(公告)日：1989-06-07

    申请号：EP87108700.3

    申请日：1987-06-16

    申请人： IDEMITSU KOSAN COMPANY LIMITED

    发明人： Shigematsu, Kazuyoshi ,  Nakagawa, Takashi ,  Sakamoto, Shuji

    IPC分类号： C08G64/04

    CPC分类号： C07C317/00 ,  C07C39/16 ,  C07C43/23 ,  C07C43/295 ,  C08G64/06

    摘要： A polycarbonate polymer containing repeating units epresented by the following general formula
    wherein: X is selected from single bond,-O-,-S-,-SO 2 -,
    wherein:
    R 1 and R 2 are each independently selected from hydrogen atom; alkyl radical of 1 to 6 carbon atoms; cycloalkyl radical of 5 to 6 carbon atoms;
    wherein is an integer having a value of from 0 to 3; phenyl radicals substituted at para position by a substituent seleced from alkoxy radicals of 1 to 5 carbon atoms, phenoxy radicals, or halogen radicals; or p-biphenylyl radical, -(CH 2 )- q wherein q is an integer having a value of from 2 to 10; or
    wherein r is an integer having a value of from 4 to 8, and having a reduced viscosity [ηsp/c] of at least 0.2 dl/g as measured in methylene chloride at a concentration of 0.5 g/dl at 20 °C. Such polycarbonates exhibit excellent optical properties such as high birefringence, and are useful as materials for optical devices. Also, a process for preparing the polycarbonates and novel dihydric phenols which can be used as materials for the polycarbonates are disclosed.