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23 条记录 (耗时 0.03 秒)

    Naphthyl and ether chain-containing carboxyl derivatives
    18.
    发明授权
    Naphthyl and ether chain-containing carboxyl derivatives 失效
    含萘基和醚链的羧基衍生物

    公开(公告)号：US5712409A

    公开(公告)日：1998-01-27

    申请号：US702388

    申请日：1996-08-14

    申请人： Guey-Sheng Liou ,  Sheng-Huei Hsiao ,  Jen-Chang Yang

    发明人： Guey-Sheng Liou ,  Sheng-Huei Hsiao ,  Jen-Chang Yang

    IPC分类号： C07C51/08 ,  C07C65/24 ,  C07C69/773 ,  C07C69/92 ,  C07C51/60 ,  C07C63/22 ,  C07C63/38

    CPC分类号： C07C69/92 ,  C07C51/08 ,  C07C65/24

    摘要： New aromatic dicarboxylic acids, 1,4- or 2,6-Bis(p-carboxyphenoxy)naphthyl is prepared by the reaction of p-fluorobenzonitrile with 1,4-naphthalenediol, followed by hydrolysis. Wholly aromatic polyamides having superior solubility in a variety of organic solvents and have good thermal stability can be obtained by reacting the new aromatic dicarboxylic acids with aromatic diamines. Transparent, tough and flexible films of these polyamides can be cast from the solutions thereof and these polyamides are easily processable high-performance polymer materials.

    摘要翻译： 新的芳族二羧酸，1,4-或2,6-双（对羧基苯氧基）萘基是通过对氟苄腈与1,4-萘二醇的反应制备的，然后水解。 通过使新的芳族二羧酸与芳族二胺反应，可以获得在各种有机溶剂中具有优异溶解性并具有良好热稳定性的全芳族聚酰胺。 这些聚酰胺的透明，坚韧和柔韧的膜可以从其溶液中浇铸，并且这些聚酰胺易于加工的高性能聚合物材料。

    Process for preparing fibers of soluble wholly aromatic polyamides
    19.
    发明授权
    Process for preparing fibers of soluble wholly aromatic polyamides 失效
    制备可溶性全芳族聚酰胺纤维的方法

    公开(公告)号：US5643518A

    公开(公告)日：1997-07-01

    申请号：US413830

    申请日：1995-03-30

    申请人： Jen-Chang Yang ,  Hsiao-Chuan Chang ,  Jin-Chyueh Lin ,  Lien-Tai Chen

    发明人： Jen-Chang Yang ,  Hsiao-Chuan Chang ,  Jin-Chyueh Lin ,  Lien-Tai Chen

    IPC分类号： D01F6/60 ,  D01F6/90 ,  D01D5/06

    CPC分类号： D01F6/605

    摘要： Soluble wholly aromatic polyamide is obtained by low-temperature polycondensation in an amide solvent such as N-methyl-2-pyrrolidone. The reaction mixture is neutralized with an alkali and spun into fibers by wet spinning, coagulated in a salt-free aqueous solution of an organic solvent, preferably the polymerization solvent, and subsequently drawn in another aqueous solution of the same organic solvent, both solutions being substantially at ambient temperatures below 50.degree. C. but above freezing, More than 60% of the total fiber drawing is executed in this low-temperature draw stage.

    摘要翻译： 可溶性全芳族聚酰胺通过在酰胺溶剂如N-甲基-2-吡咯烷酮中的低温缩聚获得。 反应混合物用碱中和，通过湿法纺丝纺丝成纤维，在无盐水溶液中优选聚合溶剂凝结，随后在相同有机溶剂的另一种水溶液中溶解，两种溶液为 基本上在环境温度低于50℃但高于冰点的情况下，在该低温拉伸阶段中执行总纤维拉伸的60％以上。