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    Perfluorinated polyimide, perfluorinated poly(amic acid), starting compounds therefor, and methods for preparing them
    2.
    发明公开
    Perfluorinated polyimide, perfluorinated poly(amic acid), starting compounds therefor, and methods for preparing them 失效
    Perfluorierte聚酰亚胺，全氟化聚乙烯，聚氨酯，和Verfahren zu ihrer Herstellung。

    公开(公告)号：EP0480266A2

    公开(公告)日：1992-04-15

    申请号：EP91116553.8

    申请日：1991-09-27

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Ando, Shinji ,  Matsuura, Toru ,  Sasaki, Shigekuni ,  Yamamoto, Fumio

    IPC分类号： C08G73/10 ,  C07C65/24 ,  C07C63/68 ,  C07C255/54

    CPC分类号： C07D209/48 ,  C07C51/08 ,  C07C51/56 ,  C07C63/68 ,  C07C65/24 ,  C07C65/28 ,  C07C255/54 ,  C07D307/89 ,  C07D487/04 ,  C07D493/04 ,  C08G73/1039 ,  C08G73/1064 ,  C08G73/1067 ,  C08G73/1071

    摘要： A perfluorinated polyimide having a repeating unit represented by general formula (1):

    and a perfluorinated poly(amic acid) having a repeating unit represented by general formula (6):
    wherein R 1 is a tetravalent organic group; and R 2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R 1 and R 2 are exclusively carbon-to-fluorine bonds; methods for preparing them; and an optical material including the perfluorinated polyimide. 1,4-Bis(3,4-dicarboxytrifluorophenoxy)tetrafluorobenzene dianhydride, 1,4-difluoropyromellitic anhydride, 1,4-bis(3,4-dicar- boxytrifluorophenoxy)tetrafluorobenzene, 1,4-difluoro-pyromellitic acid, and 1,4-bis(3,4-dicyanotrifluorophenoxy)-tetrafluorobenzene as well as methods preparing them. The perfluorinated polyimide has a thermal stability and has a low optical loss in an optical communication wavelength region (1.0 to 1.7 mm).

    摘要翻译： 具有通式（1）表示的重复单元的全氟化聚酰亚胺：具有通式（6）表示的重复单元的全氟化聚（酰胺酸）：其中R1是四价有机基团; 并且R2是二价有机基团，条件是R1和R2中包含的碳原子和一价元素之间的化学键仅为碳 - 氟键; 准备方法; 以及包含全氟化聚酰亚胺的光学材料。 1,4-二（3,4-二羧基三氟苯氧基）四氟苯二酸酐，1,4-二氟佛蒙特酸酐，1,4-双（3,4-二羧基三氟苯氧基）四氟苯，1,4-二氟 - 均苯四酸， 双（3,4-二氰三氟苯氧基）四氟苯以及制备它们的方法。 全氟聚酰亚胺具有热稳定性，并且在光通信波长区域（1.0至1.7mm）中具有低光损耗。

    Polyimide optical waveguide
    6.
    发明公开
    Polyimide optical waveguide 失效
    Opischer Wellenleiter aus Polyimid。

    公开(公告)号：EP0454590A2

    公开(公告)日：1991-10-30

    申请号：EP91401120.0

    申请日：1991-04-26

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Matsuura, Toru ,  Nishi, Shiro ,  Sasaki, Shigekuni ,  Ichino, Toshihiro ,  Yamamoto, Fumio ,  Ando, Shinji ,  Shimokawa, Fusao ,  Koike, Shinji

    IPC分类号： C08G73/10 ,  G02B6/00

    CPC分类号： G02B6/1221 ,  C08G73/1039 ,  C08G73/1067 ,  C08L79/08 ,  G02B2006/12076

    摘要： An optical waveguide which has properties including low optical losses, facile fabrication, controllrable core - cladding refractive index ratio, and high heat resistance is provided. The optical waveguide for light transmission therethrough has a core (2) made of a polyimide obtained from at least one tetracarboxylic acid dianhydride and at least one diamine. The polyimide is (a) a polyimide homopolymer derived from a diamine represented by formula [I] as follows:

    (b) a polyimide copolymer derived from at least one diamine including the diamine represented by the formula [I]; or (c) a mixture of the polyimide homopolymers.

    摘要翻译： 提供了具有低光损耗，易于制造，可控核心包层折射率比和高耐热性等特性的光波导。 用于透光的光波导具有由至少一种四羧酸二酐和至少一种二胺获得的聚酰亚胺制成的芯（2）。 聚酰亚胺是（a）衍生自由式[I]表示的二胺的聚酰亚胺均聚物，如下：（b）衍生自至少一种二胺的聚酰亚胺共聚物，包括由式[I]表示的二胺; 或（c）聚酰亚胺均聚物的混合物。