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    Method for preparing aromatic compounds
    5.
    发明授权
    Method for preparing aromatic compounds 失效
    芳香族化合物的制备方法

    公开(公告)号：US5849934A

    公开(公告)日：1998-12-15

    申请号：US20573

    申请日：1998-01-28

    申请人： Shinji Ando ,  Toru Matsuura ,  Shigekuni Sasaki ,  Fumio Yamamoto

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

    IPC分类号： G02B6/12 ,  C07C51/08 ,  C07C63/68 ,  C07C65/24 ,  C07C65/28 ,  C07C255/54 ,  C07D209/48 ,  C07D307/89 ,  C07D487/04 ,  C07D493/04 ,  C08G73/10 ,  G02B1/04 ,  G02B6/00

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

    摘要： A perfluorinated polyimide comprising a repeating unit represented by general formula (1): ##STR1## and a perfluorinated poly(amic acid) comprising a repeating unit represented by general formula (6): ##STR2## wherein R.sub.1 is a tetravalent organic group; and R.sub.2 is a divalent organic group, provided that chemical bonds between carbon atoms and monovalent elements contained in R.sub.1 and R.sub.2 are exclusively carbon-to-fluorine bonds; methods for preparing them; and optical material including the perfluorinated polyimide. 1,4-Bis(3,4-dicarboxytrifluorophenoxy)-tetrafluorobenzene dianhydride, 1,4-difluoropyromellitic anhydride, 1,4-bis(3,4-dicarboxytrifluorophenoxy)-tetrafluorobenzene, 1,4-difluoropyromellitic 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 (0.8 to 1.7 .mu.m).

    摘要翻译： 一种全氟化聚酰亚胺，其包含由通式（1）表示的重复单元：（IMAG）（1）和包含由通式（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; 制备方法 和包括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，1,4-二氟苯
    二甲酸酐，1,4-双（3,4-二羧基三氟苯氧基） - 四氟苯，1,4-二氟苯甲酸酐， 双（3,4-二氰基三氟苯氧基） - 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（0.8-1.7μm）中具有低光损耗。

    Optical adhesive composition
    9.
    发明授权
    Optical adhesive composition 失效
    光学胶粘剂组成

    公开(公告)号：US4637939A

    公开(公告)日：1987-01-20

    申请号：US827059

    申请日：1986-02-07

    申请人： Tooru Maruno ,  Kouzaburou Nakamura ,  Shigekuni Sasaki

    发明人： Tooru Maruno ,  Kouzaburou Nakamura ,  Shigekuni Sasaki

    IPC分类号： C08G59/14 ,  C08G59/22 ,  C08G59/30 ,  C08G59/38 ,  C09J163/02 ,  B05D5/06

    CPC分类号： C09J163/00 ,  C08G59/145 ,  C08G59/226 ,  C08G59/30 ,  C08G59/38

    摘要： The adhesive composition or compound of the invention comprises an epoxy resin, a reactive diluent and a hardener, and at least one of said components contains fluorine atoms. The adhesive composition containing fluorine atoms, according to the invention, provides a cured or hardened composition having small refractive index due to the presence of fluorine atoms. The refractive index of the hardened product may be freely controlled within the range of n.sub.D.sup.23 =1.415 to n.sub.D.sup.23 =1.570.The adhesive composition may be applied for the production of optical members for use in a communication system utilizing optical fibers or in a variety of optical instruments, and has improved heat resistance and adhesive property and is improved in matching of the refractive index with that of the material used for the optical member, such as optical fibers or glasses having lower refractive index used in a lens system.

    Process for preparing polyesterimide from bis(hydroxyphthalimide)
    10.
    发明授权
    Process for preparing polyesterimide from bis(hydroxyphthalimide) 失效
    由双（羟基邻苯二甲酰亚胺）制备聚酯酰亚胺的方法

    公开(公告)号：US4855390A

    公开(公告)日：1989-08-08

    申请号：US185098

    申请日：1988-04-22

    申请人： Shigekuni Sasaki ,  Yoshinori Hasuda

    发明人： Shigekuni Sasaki ,  Yoshinori Hasuda

    IPC分类号： C07D209/48

    CPC分类号： C07D209/48

    摘要： The present invention provides a bis(hydroxyphthalimide) prepared by reacting 4-hydroxyphthalic anhydride and an organic diamine in the presence of an organic solvent under heating. The bis(hydroxyphthalimide) has two intramolecular imide rings and active hydrogens, and is thus polymerizable to form a variety of polycondensation products each having imide rings by condensation. The bis(hydroxyphthalimide) is also reacted with a dicarboxylic acid dihalide to form a polyesterimide, through condensation, which is excellent in transparency and heat resisting property.