利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

34 条记录 (耗时 0.024 秒)

    Preparation of degradable copolymers
    2.
    发明授权
    Preparation of degradable copolymers 失效
    可降解共聚物的制备

    公开(公告)号：US5817728A

    公开(公告)日：1998-10-06

    申请号：US610240

    申请日：1996-03-04

    申请人： Chojiro Higuchi ,  Hiroshi Suizu ,  Masatoshi Takagi ,  Takeshi Kashima ,  Yuji Terado ,  Ikumi Kitada ,  Masanobu Ajioka ,  Akihiro Yamaguchi ,  Taiji Kameoka

    发明人： Chojiro Higuchi ,  Hiroshi Suizu ,  Masatoshi Takagi ,  Takeshi Kashima ,  Yuji Terado ,  Ikumi Kitada ,  Masanobu Ajioka ,  Akihiro Yamaguchi ,  Taiji Kameoka

    IPC分类号： C08B3/16 ,  C08B13/00 ,  C08B31/02 ,  C08G63/664 ,  C08G63/672 ,  C08G63/81 ,  C08B3/00

    CPC分类号： C08G63/81 ,  C08B13/00 ,  C08B3/16 ,  C08B31/02 ,  C08G63/664 ,  C08G63/672

    摘要： A preparation process of a degradable copolymer comprising carrying out dehydration polycondensation of polysaccharide (A) with one or more compounds (B) selected from the group consisting of: (b1) hydroxycarboxylic acid, (b2) polyhydroxycarboxylic acid, (b3) aliphatic polyhydric alcohol and aliphatic polybasic acid, and (b4) aliphatic polyester derived from aliphatic polyhydric alcohol and aliphatic polybasic acid. A copolymer having a high molecular weight, excellent toughness, transparency and heat resistance, and additionally having a high melt tension can be obtained with a reaction time less than a half of the conventional process. The copolymer obtained by the invention is a material suited for injection molding, extrusion, calendaring, blow forming, balloon forming, vacuum forming and foaming. Particularly, the copolymer obtained by the invention has a high melt tension and thus the molten copolymer is difficult to sag and flow and can be processed with ease into foams and blow bottles.

    摘要翻译： 一种可降解共聚物的制备方法，包括进行多糖（A）与一种或多种选自以下的化合物（B）的脱水缩聚：（b1）羟基羧酸，（b2）聚羟基羧酸，（b3）脂肪族多元醇 和脂族多元酸，和（b4）衍生自脂肪族多元醇和脂肪族多元酸的脂肪族聚酯。 可以获得具有低于常规方法的一半的反应时间的具有高分子量，优异的韧性，透明性和耐热性以及额外具有高熔体张力的共聚物。 通过本发明获得的共聚物是适于注射成型，挤出，压延，吹塑成型，球形成型，真空成型和发泡的材料。 特别地，本发明获得的共聚物具有高熔体张力，因此熔融共聚物难以下垂和流动，并且可以容易地加工成泡沫和吹塑瓶。

    Degradable copolymer and preparation process thereof
    3.
    发明授权
    Degradable copolymer and preparation process thereof 失效
    可降解共聚物及其制备方法

    公开(公告)号：US5847011A

    公开(公告)日：1998-12-08

    申请号：US759953

    申请日：1996-12-03

    申请人： Yuji Terado ,  Chojiro Higuchi ,  Masanobu Ajioka

    发明人： Yuji Terado ,  Chojiro Higuchi ,  Masanobu Ajioka

    IPC分类号： C08G63/64 ,  C08G81/00 ,  C08J11/04

    CPC分类号： C08G63/64 ,  C08G81/00

    摘要： A degradable copolymer obtained by heat-dehydration reaction of aromatic polycarbonate and aliphatic polyester in the presence of a catalyst, has degradability which cannot be exhibited by common aromatic polycarbonate, transparency equal to polycarbonate, thermal resistance which cannot be exhibited by common aliphatic polyester, melt flowability superior to common aromatic polycarbonate and other excellent characteristics, and thus can be widely used for processed articles which require severe properties.

    摘要翻译： 通过芳族聚碳酸酯和脂肪族聚酯在催化剂存在下进行热脱水反应获得的可降解共聚物具有普通芳族聚碳酸酯不能显示的降解性，聚碳酸酯的透明度，常用脂肪族聚酯不能显示的耐热性，熔融 流动性优于普通芳族聚碳酸酯等优异特性，因此可广泛用于需要严格性能的加工制品。

    Degradable polymer and preparation process of the same
    4.
    发明授权
    Degradable polymer and preparation process of the same 失效
    可降解聚合物及其制备方法相同

    公开(公告)号：US5914381A

    公开(公告)日：1999-06-22

    申请号：US925133

    申请日：1997-09-08

    申请人： Yuji Terado ,  Hiroshi Suizu ,  Chojiro Higuchi ,  Masanobu Ajioka

    发明人： Yuji Terado ,  Hiroshi Suizu ,  Chojiro Higuchi ,  Masanobu Ajioka

    IPC分类号： C08G63/60 ,  C08G63/08 ,  C08B3/00 ,  C08B13/00 ,  C08G63/664

    CPC分类号： C08G63/60

    摘要： A degradable polymer and a process for preparing the degradable polymer which has a structure resulting from combination of a star-shaped polymer comprising a polyfunctional base compound of polycarboxylic acid having three or more carboxyl groups and/or anhydride of the same or aliphatic polyhydric alcohol having three or more hydroxyl groups and a unit of aliphatic hydroxycarboxylic acid, with aliphatic polyhydric alcohol having two or more hydroxyl groups or polycarboxylic acid having two or more carboxyl groups or anhydrides of the same. The degradable polymer leads to remarkably low coloration as compared with a polymer comprising polysaccharide as a polyfunctional base compound, has high melt tension as compared to common aliphatic polyester is excellent in processability on various molding methods, foam molding and blow molding in particular, and high transparency.

    摘要翻译： 一种可降解聚合物和一种制备可降解聚合物的方法，其具有由包含具有三个或更多个羧基的多元羧酸的多官能基础化合物和/或其相同的酸酐的多官能基础化合物或具有 三个或多个羟基和脂族羟基羧酸单元，与具有两个或多个羟基的脂族多元醇或具有两个或多个羧基的多元羧酸或其酸酐的酸酐。 与包含多糖作为多官能基础化合物的聚合物相比，与普通脂肪族聚酯相比，具有较高的熔融张力，可降解聚合物导致显着低的着色，在各种成型方法，发泡成型和吹塑成型方面具有优异的加工性，特别是高 透明度。

    Aliphatic polyester and preparation process thereof
    6.
    发明授权
    Aliphatic polyester and preparation process thereof 失效
    脂肪族聚酯及其制备方法

    公开(公告)号：US5428126A

    公开(公告)日：1995-06-27

    申请号：US368879

    申请日：1995-01-05

    申请人： Takeshi Kashima ,  Taiji Kameoka ,  Chojiro Higuchi ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    发明人： Takeshi Kashima ,  Taiji Kameoka ,  Chojiro Higuchi ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    IPC分类号： C08G63/16 ,  C08G63/60 ,  C08G63/81 ,  C08F6/16

    CPC分类号： C08G63/60 ,  C08G63/16 ,  C08G63/81

    摘要： A preparation process of aliphatic polyester having a weight average molecular weight of 15,000 or more by conducting a direct polycondensation reaction of an aliphatic polyhydric alcohol or a mixed aliphatic polyhydric alcohol and an aliphatic polybasic acid or a mixed aliphatic polybasic acid, or additionally a hydroxycarboxylic acid or a mixed hydroxycarboxylic acid or an oligomer of the hydroxycarboxylic acid in a reaction mixture containing an organic solvent.The aliphatic polyester thus obtained contains an extremely small amount of impurities, has low color and can exhibit satisfactory strength in the form of films, filaments and other shaped articles.

    摘要翻译： 通过进行脂肪族多元醇或混合脂肪族多元醇与脂肪族多元酸或混合脂肪族多元酸的直接缩聚反应，或另外添加羟基羧酸，进行重均分子量为15000以上的脂肪族聚酯的制备方法 或羟基羧酸的混合羟基羧酸或低聚物在含有机溶剂的反应混合物中。 由此获得的脂肪族聚酯含有极少量的杂质，颜色低，并且可以以薄膜，长丝和其它成型制品的形式显示令人满意的强度。

    Preparation process of .alpha.-aspartyl-L-phenylalanine methyl ester
    7.
    发明授权
    Preparation process of .alpha.-aspartyl-L-phenylalanine methyl ester 失效
    α-天门冬酰基-L-苯丙氨酸甲酯的制备方法

    公开(公告)号：US5424477A

    公开(公告)日：1995-06-13

    申请号：US128739

    申请日：1993-09-30

    申请人： Chojiro Higuchi ,  Ikumi Kitada ,  Akinori Nagatomo ,  Katashi Enomoto ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    发明人： Chojiro Higuchi ,  Ikumi Kitada ,  Akinori Nagatomo ,  Katashi Enomoto ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    IPC分类号： A23L27/30 ,  C07K5/075 ,  C07C209/06

    CPC分类号： C07K5/0613

    摘要： .alpha.-L-Aspartyl-L-phenylalanine methyl ester (.alpha.-APM) is prepared by catalytic hydrogenation of N-benzyloxycarbonyl-.alpha.-L-aspartyl-L-phenylalanine methyl ester (Z-.alpha.-APM). The catalytic hydrogenation is conducted in an aqueous suspension containing the Z-.alpha.-APM in the form of particles whose average particle size is not greater than 800 .mu.m. The starting Z-.alpha.-APM may contain up to 30 wt. % of its .beta.-isomer provided that the process additionally includes recrystallization of the .alpha.-APM, collection of the .alpha.-APM by filtration and recycling of the filtrate for use in the aqueous suspension of Z-.alpha.-APM.

    摘要翻译： 通过N-苄氧羰基-α-L-天冬氨酰-L-苯丙氨酸甲酯（Z-α-APM）的催化氢化制备α-L-天冬氨酰-L-苯丙氨酸甲酯（α-APM）。 催化氢化在含有平均粒径不大于800μm的颗粒形式的Z-α-APM的水性悬浮液中进行。 起始的Z-α-APM可含有至多30wt。 ％的β-异构体，条件是该方法另外包括α-APM的重结晶，通过过滤收集α-APM并再循环用于Z-α-APM的水悬浮液中的滤液。