利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

62 条记录 (耗时 0.023 秒)

    Preparation process of .alpha.-aspartyl-L-phenylalanine methyl ester
    1.
    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。

    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。

    Preparation process of degradable polymer
    3.
    发明授权
    Preparation process of degradable polymer 失效
    可降解聚合物的制备方法

    公开(公告)号：US5637631A

    公开(公告)日：1997-06-10

    申请号：US553984

    申请日：1995-11-06

    申请人： Ikumi Kitada ,  Chojiro Higuchi ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    发明人： Ikumi Kitada ,  Chojiro Higuchi ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    IPC分类号： C08G63/08 ,  C08G63/60 ,  C08G63/81 ,  C08K5/00 ,  C08F20/00

    CPC分类号： C08G63/08 ,  C08G63/60 ,  C08G63/81

    摘要： A process for preparing a degradable copolymer of aliphatic polyester comprising the steps of reacting two or more kinds of aliphatic polyester homopolymer in the presence of a catalyst in a reaction mixture containing an organic solvent, and a degradable copolymer of aliphatic polyester obtained by said preparation process. The copolymers exhibits high transparency in addition to excellent strength and elongation, can be processed into various molded articles and formed items such as films and filaments, and can provide heat resistance by heat treatment of said molded articles and formed items. The copolymer can be suitably utilized for processed articles such as a film, breathable film, sheet, textile, monofilament, multifilament, yarn, non-woven fabric, flat yarn, staple, crimped fiber, ribbed tape, split yarn, conjugate fiber, laminate, blow-bottle, sheet, stretched sheet, foam and net.

    摘要翻译： 一种制备脂肪族聚酯的可降解共聚物的方法，包括以下步骤：在催化剂存在下，在含有机溶剂的反应混合物和通过所述制备方法得到的脂族聚酯的可降解共聚物之间使两种或更多种脂肪族聚酯均聚物反应 。 除了优异的强度和伸长率之外，共聚物显示出高透明度，可以加工成各种成型体和成膜物品如膜和长丝，并且可以通过所述模制品和成形品的热处理提供耐热性。 该共聚物可以适用于薄膜，透气薄膜，薄片，纺织品，单丝，复丝，纱线，无纺布，扁丝，短纤维，卷曲纤维，带肋带，分裂纱，复合纤维，叠层 吹瓶，片，拉伸片，泡沫和网。

    Polyhydroxycarboxylic acid and preparation process thereof
    5.
    发明授权
    Polyhydroxycarboxylic acid and preparation process thereof 失效
    聚羟基羧酸及其制备方法

    公开(公告)号：US5310865A

    公开(公告)日：1994-05-10

    申请号：US992696

    申请日：1992-12-18

    申请人： Katashi Enomoto ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    发明人： Katashi Enomoto ,  Masanobu Ajioka ,  Akihiro Yamaguchi

    IPC分类号： C08G63/06

    CPC分类号： C08G63/06

    摘要： A process for preparing polyhydroxycarboxylic acid by conducting a dehydration condensation of a hydroxycarboxylic acid or an oligomer thereof in a reaction mixture containing an organic solvent substantially in the absence of water and the polyhydroxycarboxylic acid thus obtained. The process provides polyhydroxycarboxylic acid having excellent properties and processability.

    摘要翻译： 通过在含有基本上不存在水的有机溶剂和由此得到的聚羟基羧酸的反应混合物中进行羟基羧酸或其低聚物的脱水缩合制备聚羟基羧酸的方法。 该方法提供具有优异性能和加工性能的聚羟基羧酸。

    Aliphatic polyester and preparation process thereof
    10.
    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。