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    Random copolymerized polyamide resin and process for preparing the same
    1.
    发明授权
    Random copolymerized polyamide resin and process for preparing the same 失效
    无规共聚聚酰胺树脂及其制备方法

    公开(公告)号：US5723569A

    公开(公告)日：1998-03-03

    申请号：US710256

    申请日：1996-09-13

    申请人： Shin-ichi Sato ,  Masaaki Miyamoto ,  Kenji Tsuruhara ,  Yoshiaki Ohtani

    发明人： Shin-ichi Sato ,  Masaaki Miyamoto ,  Kenji Tsuruhara ,  Yoshiaki Ohtani

    IPC分类号： C08G69/08 ,  C08G69/16 ,  C08G69/36

    CPC分类号： C08G69/36

    摘要： A random copolymerized polyamide resin is prepared by reacting a lactam of the formula (I): ##STR1## wherein R.sup.1 is a C.sub.2-11 alkylene group optionally substituted with a substituent having 1 to 6 carbon atoms, with a hexamethylenediamine-adipic acid salt while concentrating the aqueous solution of the salt to a concentration of at least 70% by weight and while maintaining a uniform reaction phase at all times by controlling the pressure over and the temperature of the reaction medium such that the hexamethylenediamine-adipic acid salt does not precipitate, said pressure being up to not greater than 2 kg/cm.sup.2 .multidot.G and said temperature being up to not greater than 150.degree. C., and then mixing in the solution of the lactam of formula (I) thereby effecting copolymerization and forming a polyamide resin having a relative viscosity measured by the sulfuric acid solution method (1% at 25.degree. C.) of 1.5 to 8.0.

    摘要翻译： 无规共聚的聚酰胺树脂通过使式（I）的内酰胺：其中R 1是任选被具有1至6个碳原子的取代基取代的C 2-11亚烷基与六亚甲基二胺 - 己二酸 同时将盐水溶液浓缩至至少70重量％，同时通过控制反应介质的压力和温度始终保持均匀的反应相，使得六亚甲基二胺 - 己二酸盐 所述压力不大于2kg / cm 2×G，所述温度不大于150℃，然后在式（I）的内酰胺溶液中混合，从而进行共聚，形成 通过硫酸溶液法（25℃下1％）测定的相对粘度为1.5〜8.0的聚酰胺树脂。

    Polycarbonate resin composition for optical use
    4.
    发明授权
    Polycarbonate resin composition for optical use 失效
    光学用聚碳酸酯树脂组合物

    公开(公告)号：US5350790A

    公开(公告)日：1994-09-27

    申请号：US41189

    申请日：1993-04-01

    申请人： Yoshitomi Urabe ,  Hironori Hayashida ,  Yoshiaki Ohtani

    发明人： Yoshitomi Urabe ,  Hironori Hayashida ,  Yoshiaki Ohtani

    IPC分类号： C08K5/09 ,  G11B7/253 ,  G11B7/2534 ,  C08J7/14 ,  C08L69/00

    CPC分类号： G11B7/253 ,  C08K5/09 ,  G11B7/2534

    摘要： This invention provides a polycarbonate resin composition for optical use and an optical disc substrate manufactured therefrom. Polycarbonate resin is mixed with at least one kind of carboxylic acid selected from aliphatic carboxylic acids having 1 to 10 carbon atoms in which hydrogen atoms of aliphatic group may be substituted by hydroxyl groups; or aromatic carboxylic acids in which hydrogen atoms of the aromatic ring may be substituted by low alkyl groups, hydroxyl groups, or halogen atoms.The amount of the carboxylic acids is 5 to 1000 ppm based on the polycarbonate resin.

    摘要翻译： 本发明提供一种光学用聚碳酸酯树脂组合物及其制造的光盘基片。 将聚碳酸酯树脂与至少一种选自具有1-10个碳原子的脂族羧酸的羧酸混合，其中脂族基团的氢原子可被羟基取代; 或其中芳环的氢原子可以被低级烷基，羟基或卤素原子取代的芳族羧酸。 基于聚碳酸酯树脂，羧酸的量为5〜1000ppm。

    Preparation with controlled amounts of polycarbonate carbon tetrachloride
    5.
    发明授权
    Preparation with controlled amounts of polycarbonate carbon tetrachloride 失效
    用可控量的聚碳酸酯四氯化碳制备

    公开(公告)号：US4839458A

    公开(公告)日：1989-06-13

    申请号：US63001

    申请日：1987-06-17

    申请人： Shinichiro Koga ,  Akira Matsuno ,  Katsuyuki Sakata ,  Yoshiaki Ohtani ,  Isao Akihara

    发明人： Shinichiro Koga ,  Akira Matsuno ,  Katsuyuki Sakata ,  Yoshiaki Ohtani ,  Isao Akihara

    IPC分类号： C08G64/24 ,  C08G64/40

    CPC分类号： C08G64/24 ,  C08G64/406

    摘要： Disclosed herein is a process for producing a resin having carbonate bonding, comprising polymerizing a hydroxydiaryl compound and phosgene in an organic solvent of methylene chloride such that the concentration of carbon tetrachloride in phosgene and methylene chloride in the polymerization system satisfies the following equation:A+5B.ltoreq.200(wherein A represents carbon tetrachloride concentration (ppm) in phosgene and B represents carbon tetrachloride concentration (ppm) in methylene chloride).

    摘要翻译： 本发明公开了一种生产具有碳酸酯键合的树脂的方法，包括在二氯甲烷的有机溶剂中使羟基二芳基化合物和光气聚合，使得聚合体系中光气和二氯甲烷中的四氯化碳的浓度满足下列等式：A + 5B（其中A表示碳酰氯中的四氯化碳浓度（ppm），B表示二氯甲烷中的四氯化碳浓度（ppm））。