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公开(公告)号：US5780704A
公开(公告)日：1998-07-14
申请号：US68085
申请日：1993-05-28
CPC分类号： C07C51/09 , C08J11/16 , C08J2367/04 , Y02W30/705
摘要： A process for decomposing a thermoplastic polymer composition which comprises a polyhydroxycarboxylic acid base polymer as a primary component in an alkaline solution, recovering hydroxycarboxylic acid from the solution by electrodialysis or acid-precipitation and using the recovered hydroxycarboxylic acid for a polymer material, when desired, is provided.
摘要翻译： 一种在碱性溶液中分解包含聚羟基羧酸基聚合物作为主要组分的热塑性聚合物组合物的方法，通过电渗析或酸沉淀从溶液中回收羟基羧酸，并且如果需要，使用回收的羟基羧酸， 被提供。
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公开(公告)号：US5447962A
公开(公告)日：1995-09-05
申请号：US186920
申请日：1994-01-27
申请人： Masanobu Ajioka , Katashi Enomoto , Akihiro Yamaguchi , Kazuhiko Suzuki , Takayuki Watanabe , Yasuhiro Kitahara
发明人： Masanobu Ajioka , Katashi Enomoto , Akihiro Yamaguchi , Kazuhiko Suzuki , Takayuki Watanabe , Yasuhiro Kitahara
CPC分类号： C08J9/06 , C08J9/14 , C08J2367/04 , Y10S521/916
摘要： Foams comprising innumerable cells dispersed in thermoplastic polymer compositions substantially consisting of polylactic acid or a copolymer of lactic acid and hydroxycarboxylic acid and having degradable characteristics in the natural environment.The foams can be used for containers such as food trays and throw away cups comprising molded sheet foam of a thermoplastic and degradable polymer or heat insulating materials and cushioning materials comprising bulk foam.
摘要翻译： 包含分散在基本上由聚乳酸或乳酸和羟基羧酸的共聚物组成的热塑性聚合物组合物中的无数细胞的泡沫在天然环境中具有可降解的特性。 泡沫可以用于诸如食物托盘的容器，并且丢弃包括热塑性和可降解聚合物的模塑片状泡沫或包含散装泡沫的隔热材料和缓冲材料的杯子。
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公开(公告)号：US5556711A
公开(公告)日：1996-09-17
申请号：US380311
申请日：1995-01-30
CPC分类号： B32B15/08 , Y10T428/1355 , Y10T428/31678 , Y10T428/31688
摘要： A multilayer composite consisting of aluminum and a resin composition primarily comprising a lactic acid base polymer, is disclosed. The composite material is excellent in mechanical and gas barrier properties and has characteristic of totally decomposing under alkaline conditions.
摘要翻译： 公开了一种由铝和主要包含乳酸基聚合物的树脂组合物组成的多层复合材料。 复合材料的机械和气体阻隔性能优异，具有在碱性条件下完全分解的特点。
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公开(公告)号：US5310865A
公开(公告)日：1994-05-10
申请号：US992696
申请日：1992-12-18
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。
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公开(公告)号：US5434004A
公开(公告)日：1995-07-18
申请号：US338791
申请日：1994-11-08
CPC分类号： B32B27/06 , Y10S428/913 , Y10T428/2969 , Y10T428/31504 , Y10T428/31993 , Y10T442/3854
摘要： A laminate comprising a thermoplastic polymer essentially consisting of polylactic acid, a copolymer of lactic acid and hydroxycarboxylic acid or a mixture of polylactic acid with a copolymer of lactic acid and hydroxycarboxylic acid, and a regenerated cellulose film, paper, leather, cloth, or fiber. The laminate undergoes degradability in the natural environment, is excellent in transparency, gloss and moisture-proofness, has high strength and can be used for various packaging materials.
摘要翻译： 包含基本由聚乳酸，乳酸和羟基羧酸的共聚物或聚乳酸与乳酸和羟基羧酸的共聚物的混合物的热塑性聚合物和再生纤维素膜，纸，皮革，布或纤维组成的层压体 。 层压体在自然环境中经历降解性，透明性，光泽和防湿性优异，强度高，可用于各种包装材料。
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公开(公告)号：US5444107A
公开(公告)日：1995-08-22
申请号：US917351
申请日：1992-07-23
CPC分类号： C08L3/00 , C08L3/04 , C08L67/04 , C08L2201/06
摘要： A degradable polymer composition essentially consisting of a mixture of a thermoplastic polymer composition primarily comprising polylactic acid or lactic acid-hydroxycarboxylic acid copolymer and one or more substance selected from starch and modified starch, and is a degradable polymer which does not cause problems such as environmental pollution and can be used for films, filaments and packaging materials, food packaging materials in particular.
摘要翻译： 一种可降解聚合物组合物，其主要由主要包含聚乳酸或乳酸 - 羟基羧酸共聚物的热塑性聚合物组合物和选自淀粉和改性淀粉的一种或多种物质的混合物组成，并且是不会引起诸如环境的问题的可降解聚合物 污染，可用于薄膜，细丝和包装材料，特别是食品包装材料。
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7.发明授权
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。
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公开(公告)号：US5763098A
公开(公告)日：1998-06-09
申请号：US892265
申请日：1997-07-14
IPC分类号： B32B27/10 , B32B27/36 , C08G63/16 , C08G63/60 , C08G63/81 , C08L67/00 , C08L67/02 , D04H1/42 , D04H13/00 , D06N7/04 , C08G63/02
CPC分类号： C08L67/02 , B32B27/10 , B32B27/36 , C08G63/16 , C08G63/60 , C08G63/81 , C08L67/00 , D04H1/4258 , D04H1/435 , C08L2201/06 , Y10T428/24355 , Y10T428/249921 , Y10T428/2913 , Y10T428/3179
摘要： Formed products such as foams, fabrics for industrial materials, filaments, nonwoven fabrics, composite materials and films which are degradable after use with ease in the natural environment are prepared by using a high molecular weight aliphatic polyester obtained by direct polycondensation of an aliphatic polyhydric alcohol with aliphatic polybasic acid or additionally hydroxycarboxylic acid or oligomers of these materials in a reaction mixture containing a solvent. Foams have excellent thermal insulation and strength; fabrics are excellent in thermal insulation, strength and elongation and can be used for industrial materials; filaments have sufficient strength, flexibility and degradability in a living body and can be used for bioabsorbable surgical filament and fishing lines; nonwoven fabrics can be obtained by bonding a web of filaments and have excellent strength and feeling; composite materials can be prepared by adhering or impregnating fiber, paper, film and others of cellulosics and have excellent strength and water resistance, good flexibility and folding resistance, simultaneously have degradability in the natural environment, and can dissolve polymer films on the surface with ease under alkaline conditions to recover cellulosics alone; and films are excellent in heat resistance and strength.
摘要翻译： 通过使用通过脂肪族多元醇的直接缩聚得到的高分子量脂肪族聚酯，可以制备如在天然环境中容易使用后可降解的泡沫，工业用材料，长丝，无纺布，复合材料和薄膜等成型产品 与脂族多元酸或另外的羟基羧酸或这些物质的低聚物在含有溶剂的反应混合物中。 泡沫具有优良的保温和强度; 织物绝热性，强度和伸长率优良，可用于工业材料; 细丝在活体中具有足够的强度，柔韧性和降解性，可用于生物可吸收的手术细丝和钓鱼线; 非织造织物可以通过粘合丝网而获得，并且具有优异的强度和感觉; 复合材料可以通过粘合或浸渍纤维素的纤维，纸，膜等而具有优异的强度和耐水性，良好的柔韧性和耐折叠性，同时在天然环境中具有降解性，并且可以容易地溶解表面上的聚合物膜 在碱性条件下单独回收纤维素; 并且膜的耐热性和强度优异。
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公开(公告)号：US5714230A
公开(公告)日：1998-02-03
申请号：US340902
申请日：1994-11-15
IPC分类号： B32B27/10 , B32B27/36 , C08G63/16 , C08G63/60 , C08G63/81 , C08L67/00 , C08L67/02 , D04H1/42 , D04H13/00 , D06N7/04 , B32B00/00
CPC分类号： C08L67/02 , B32B27/10 , B32B27/36 , C08G63/16 , C08G63/60 , C08G63/81 , C08L67/00 , D04H1/4258 , D04H1/435 , C08L2201/06 , Y10T428/24355 , Y10T428/249921 , Y10T428/2913 , Y10T428/3179
摘要： Formed products such as foams, fabrics for industrial materials, filaments, nonwoven fabrics, composite materials and films which are degradable after use with ease in the natural environment are prepared by using a high molecular weight aliphatic polyester obtained by direct polycondensation of an aliphatic polyhydric alcohol with aliphatic polybasic acid or additionally hydroxycarboxylic acid or oligomers of these materials in a reaction mixture containing a solvent. Foams have excellent thermal insulation and strength; fabrics are excellent in thermal insulation, strength and elongation and can be used for industrial materials; filaments have sufficient strength, flexibility and degradability in a living body and can be used for bioabsorbable surgical filament and fishing lines; nonwoven fabrics can be obtained by bonding a web of filaments and have excellent strength and feeling; composite materials can be prepared by adhering or impregnating fiber, paper, film and others of cellulosics and have excellent strength and water resistance, good flexibility and folding resistance, simultaneously have degradability in the natural environment, and can dissolve polymer films on the surface with ease under alkaline conditions to recover cellulosics alone; and films are excellent in heat resistance and strength.
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公开(公告)号：US5525682A
公开(公告)日：1996-06-11
申请号：US473205
申请日：1995-06-07
IPC分类号： C08G69/10 , C08G69/48 , C08G73/10 , C08F283/04
CPC分类号： C08G69/10 , C08G69/48 , C08G73/1092
摘要： A process for preparing a novel superabsorbent polymer which is readily hydrolyzed and conform to environment by reacting a polysuccinimide with a diamine in an aqueous solution or an organic solvent to partially crosslink the polysuccinimide, and subsequently or concurrently hydrolyzing the remaining imide ring with an alkali while controlling the pH; and the superabsorbent polymer thus obtained.
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