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    Polycarbonate containing compound from bis(3-phenyl-4-hydroxyphenyl)
    2.
    发明授权
    Polycarbonate containing compound from bis(3-phenyl-4-hydroxyphenyl) 失效
    来自双（3-苯基-4-羟基苯基）

    公开(公告)号：US4892924A

    公开(公告)日：1990-01-09

    申请号：US287036

    申请日：1988-12-21

    申请人： Kazuyoshi Shigematsu ,  Takashi Nakagawa ,  Shuji Sakamoto

    发明人： Kazuyoshi Shigematsu ,  Takashi Nakagawa ,  Shuji Sakamoto

    IPC分类号： C07C39/15 ,  C07C39/16 ,  C07C43/21 ,  C07C43/23 ,  C07C43/295 ,  C08G64/04 ,  C08G64/06 ,  C08L69/00

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

    摘要： A polycarbonate polymer containing repeating units represented by the following general formula ##STR1## wherein: X is selected from single bond, ##STR2## wherein: R.sup.1 and R.sup.2 are each independently selected from hydrogen atom; alkyl radical of 1 to 6 carbon atoms; cycloalkyl radical of 5 to 6 carbon atoms; ##STR3## wherein p is an integer having a value of from 0 to 3; phenyl radicals substituted at para position by a substituent selected from alkoxy radicals of 1 to 5 carbon atoms, phenoxy radicals, or halogen radicals; or p-biphenylyl radical, --CH.sub.2).sub.q wherein q is an integer having a value of from 2 to 10; or ##STR4## wherein r is an integer having a value of from 4 to 8, and having a reduced viscosity [.eta.sp/c] of at least 0.2 dl/g as measured in methylene chloride at a concentration of 0.5 g/dl at 20.degree. 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，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; 苯基在对位被选自1至5个碳原子的烷氧基的取代基取代，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，其具有至少0.2dl / g的比浓粘度[η] / c]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。

    Polyformal resin and process for producing said resin
    4.
    发明授权
    Polyformal resin and process for producing said resin 失效
    聚甲醛树脂及其制造方法

    公开(公告)号：US4801679A

    公开(公告)日：1989-01-31

    申请号：US146244

    申请日：1988-01-20

    申请人： Kazuyoshi Shigematsu ,  Shigenori Shirouzu

    发明人： Kazuyoshi Shigematsu ,  Shigenori Shirouzu

    IPC分类号： C08G65/34 ,  C08G65/40 ,  C08L71/00

    CPC分类号： C08G65/40 ,  C08L71/00 ,  C08G2650/44

    摘要： Polyformal resins having a repeating unit represented by the general formula: ##STR1## wherein the symbols are as defined in the appended claims and an intrinsic viscosity at 20.degree. C. as a methylene chloride solution of at least 0.2 dl/g, and a process for efficiently producing the polyformal resins. The present polyformal resins are excellent in heat resistance and optical properties, and thus are useful as materials for production of optical instruments, for example.

    摘要翻译： 具有由以下通式表示的重复单元的聚甲醛树脂：其中符号如所附权利要求中所定义，并且20℃下的特性粘度为至少0.2dl / g的二氯甲烷溶液，和方法 用于有效地生产聚甲醛树脂。 本发明的聚甲醛树脂的耐热性和光学性能优异，因此可用作例如用于生产光学仪器的材料。