-
公开(公告)号：US5034209A
公开(公告)日：1991-07-23
申请号：US508699
申请日：1990-04-13
摘要： Chlorine is produced by reacting hydrogen chloride and oxygen in the presence of a chromium oxide catalyst in a reactor whose catalyst-contacting part is lined with one of lining materials represented by the following general formula(I):M.sub.a X.sub.b (I)wherein M means boron, aluminum, silicon, titanium, zirconium or chromium, X denotes oxygen, nitrogen or carbon, a is an integer of 1-2 and b stands for an integer of 1-3 or with a mixture of at least two of the lining materials. The above process and reactor are effective in maintaining the activity of the catalyst.
-
公开(公告)号：US06528617B1
公开(公告)日：2003-03-04
申请号：US09869154
申请日：2001-06-25
申请人： Yuji Terado , Hiroshi Suizu , Masatoshi Takagi , Masanobu Ajioka , Shoji Hiraoka , Masayuki Sakai , Hiroyuki Suzuki , Ryo Shinagawa , Shinji Ogawa , Yasushi Kotaki
发明人： Yuji Terado , Hiroshi Suizu , Masatoshi Takagi , Masanobu Ajioka , Shoji Hiraoka , Masayuki Sakai , Hiroyuki Suzuki , Ryo Shinagawa , Shinji Ogawa , Yasushi Kotaki
IPC分类号： C08F600
摘要： The invention relates to a process for producing an aliphatic polyester excellent in stability which includes subjecting an aliphatic polyester containing at least 50% of an aliphatic hydroxycarboxylic acid unit, obtainable by solid-phase polymerization under a flowing gas in the presence of a volatile catalyst so as to have a desired weight average molecular weight within the range of 50,000 to 1,000,000, to a heat treatment at a temperature equal to or higher than the reaction temperature of the solid-phase polymerization under a flowing gas with maintaining the aliphatic polyester in a solid state. According to the process of the invention, an aliphatic polyester excellent in stability at molding and storage stability is obtained.
摘要翻译： 本发明涉及稳定性优异的脂肪族聚酯的制造方法，其特征在于，在挥发性催化剂的存在下，使含有至少50％脂肪族羟基羧酸单元的脂肪族聚酯，在流动气体下通过固相聚合得到， 为了使所需的重均分子量在50,000〜1,000,000范围内，在等于或高于流动气体下的固相聚合反应温度的温度下进行热处理，同时保持脂族聚酯为固体 州。 根据本发明的方法，获得了在成型时的稳定性优异且储存稳定性优异的脂肪族聚酯。
-
公开(公告)号：US6140458A
公开(公告)日：2000-10-31
申请号：US300292
申请日：1999-04-27
申请人： Yuji Terado , Hiroshi Suizu , Masatoshi Takagi , Masanobu Ajioka , Shoji Hiraoka , Masayuki Sakai , Hiroyuki Suzuki , Ryo Shinagawa , Shinji Ogawa , Yasushi Kotaki
发明人： Yuji Terado , Hiroshi Suizu , Masatoshi Takagi , Masanobu Ajioka , Shoji Hiraoka , Masayuki Sakai , Hiroyuki Suzuki , Ryo Shinagawa , Shinji Ogawa , Yasushi Kotaki
摘要： The invention provides a process for producing high-molecular aliphatic polyesters capable of being substitutes for general-purpose resins that are required to have high toughness, in a simplified manner and at a high volume efficiency. Specifically, in the process, used as the starting material is an easily-available, low-molecular aliphatic polyester prepolymer to be prepared through polycondensation of inexpensive materials of an aliphatic hydroxycarboxylic acid such as lactic acid, glycolic acid or the like, an aliphatic polyalcohol such as butanediol or the like, and an aliphatic polycarboxylic acid such as succinic acid or the like, and the starting prepolymer is crystallized and thereafter polycondensed in a solid phase in the presence of a catalyst to give the intended, tough and high-molecular aliphatic polyester.
摘要翻译： 本发明提供了一种制备高分子量脂肪族聚酯的方法，其能够以简单的方式和高体积效率代替要求具有高韧性的通用树脂。 具体地说，在作为起始原料的方法中，作为通过脂肪族羟基羧酸如乳酸，乙醇酸等的廉价材料的缩聚制备的容易获得的低分子量脂肪族聚酯预聚物，脂肪族多元醇 例如丁二醇等，和脂肪族多元羧酸如琥珀酸等，并将起始预聚物结晶化，然后在催化剂存在下在固相中缩聚，得到所需的韧性和高分子量脂族 聚酯。
-
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。
-
公开(公告)号：US5691424A
公开(公告)日：1997-11-25
申请号：US450927
申请日：1995-05-25
摘要： A preparation process of heat-resistant molded articles of a lactic acid-based polymer comprising mixing the lactic acid-based polymer and poly-.epsilon.-caprolactone so as to obtain a L-lactic acid ratio of 75% by weight or more, adding to the polymer mixture a crystalline inorganic powder containing 50% by weight or more of SiO.sub.2, melt-kneading the resultant composition, filling the same into a mold which is set at 85.degree..about.125.degree. C. and forming a shape while promoting crystallization. The molded articles have excellent heat resistance and impact strength, are suitably used for food trays and beverage cups, and can be degraded, in the case of waste, into nontoxic water and carbon dioxide like natural products within a relatively short period in the natural environment.
摘要翻译： 一种乳酸类聚合物的耐热成型体的制备方法，其特征在于，将乳酸类聚合物和聚ε-己内酯混合，得到75重量％以上的L-乳酸比例，添加到 聚合物混合物是含有50重量％以上SiO 2的结晶无机粉末，将所得组合物熔融捏合，将其填充到设定在85℃125℃的模具中并形成同时促进结晶。 模塑制品具有优异的耐热性和冲击强度，适用于食品托盘和饮料杯，并且在废物的情况下可以在自然环境相对短的时间内降解成无毒的水和二氧化碳如天然产物 。
-
公开(公告)号：US5679767A
公开(公告)日：1997-10-21
申请号：US564736
申请日：1995-11-29
CPC分类号： C08G63/90
摘要： The invention is a purification process of an aliphatic polyester prepared in the presence of a catalyst from a hydroxycarboxylic acid or a cyclic ester of a hydroxycarboxylic acid, or a combination of an aliphatic polyhydric alcohol with an aliphatic polybasic acid, or a mixture of these compounds, comprising deactivating the catalyst while maintaining the aliphatic polyester in a molten or dissolved state, or insolubilizing and separating the catalyst and successively removing low molecular compounds; and can provide aliphatic polyester which has a low content of unreacted monomers and low molecular weight compounds and is excellent in heat resistance and weatherability.
摘要翻译： 本发明是在由羟基羧酸或羟基羧酸的环状酯或脂族多元醇与脂肪族多元酸的组合的催化剂或这些化合物的混合物存在下制备的脂肪族聚酯的纯化方法 包括使所述催化剂失活，同时保持所述脂肪族聚酯处于熔融或溶解状态，或使所述催化剂不溶解和分离并连续除去低分子化合物; 并且可以提供具有低含量的未反应单体和低分子量化合物的脂肪族聚酯，并且耐热性和耐候性优异。
-
公开(公告)号：US5484945A
公开(公告)日：1996-01-16
申请号：US288454
申请日：1994-08-10
IPC分类号： C08G73/10 , C07D207/10
CPC分类号： C08G73/1092
摘要： In the process for preparing polysuccinimide by dehydration condensation of aspartic acid in an organic solvent, polysuccinimide can be obtained simply and suitably in industry by removing a portion or more of the organic solvent from the reaction mixture while charging to the reaction mixture an additional organic solvent containing less amount of water than that of the removed organic solvent.
摘要翻译： 在通过天冬氨酸在有机溶剂中脱水缩合制备聚琥珀酰亚胺的方法中，通过从反应混合物中除去一部分或更多种有机溶剂，可以简单适当地在工业上获得聚琥珀酰亚胺，同时向反应混合物中加入另外的有机溶剂 含有比去除的有机溶剂少的水量。
-
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。
-
公开(公告)号：US5409751A
公开(公告)日：1995-04-25
申请号：US32284
申请日：1993-03-17
CPC分类号： B65D65/466 , B29C49/0005 , C08L67/04 , B29K2067/00 , B29K2067/046 , B29K2995/0026 , B29K2995/0063 , B29K2995/0089 , Y02W90/12 , Y02W90/13 , Y10T428/139 , Y10T428/1397
摘要： A degradable container which is excellent in transparency and impact strength and can be decomposed into nontoxic water and carbon dioxide in the natural environment within a relatively short period can be obtained by using the process for molding a container of an arbitrary shape from a thermoplastic composition having polylactic acid of lactic acids or a copolymer of lactic acids and other hydroxycarboxylic acids as a main component, preforming the composition and thereafter molding the container in a temperature range from Tg to Tg+60.degree. C. on the basis of the glass transition temperature Tg of the thermoplastic polymer composition and under the condition of a draw ratio of 6 times or less.
摘要翻译： 通过使用从具有任意形状的容器成型任意形状的容器的方法可以获得透明度和冲击强度优异并且可以在相对较短的时间内在自然环境中分解成无毒水和二氧化碳的可降解容器，该方法由具有 乳酸的聚乳酸或乳酸与其它羟基羧酸的共聚物作为主要成分，预先形成组合物，然后基于玻璃化转变温度Tg在Tg至Tg + 60℃的温度范围内成型容器 的热塑性聚合物组合物，并且在拉伸比为6倍以下的条件下进行。
-
公开(公告)号：US5401796A
公开(公告)日：1995-03-28
申请号：US219344
申请日：1994-03-29
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.
-
-
-
-
-
-
-
-
-
搜索结果
62 条记录 (耗时 0.023 秒)
