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1. 发明授权

US5443780A Oriented films of polylactic acid and methods of producing same 失效
标题翻译：聚乳酸取向膜及其制备方法
公开(公告)号：US5443780A
公开(公告)日：1995-08-22
申请号：US265348
申请日：1994-06-24
申请人： Kiyoichi Matsumoto , Shu Tahara , Eiichi Ozeki , Makoto Ogaito , Masakazu Kobayashi
发明人： Kiyoichi Matsumoto , Shu Tahara , Eiichi Ozeki , Makoto Ogaito , Masakazu Kobayashi
IPC分类号： B29C47/88 , B29C55/00 , B29C55/02 , B29K67/00 , B29K105/32 , B29L7/00 , C08G63/08 , C08J5/18 , C08L67/00 , C08L67/04
CPC分类号： C08J5/18 , B29C55/005 , B29K2067/00 , B29K2067/046 , B29K2995/0059 , C08J2367/04
摘要： An oriented film with improved tensile strength and Young's modulus can be produced by melting and extruding poly-L-lactic acid and/or poly-D-lactic acid to form a film and, after the film is cooled rapidly, by subjecting it to a stretching process at a temperature above the glass transition temperature and below the cold-crystallization temperature. The stretching may be effected by a method of uniaxial stretching with constant width, successive biaxial stretching or simultaneous biaxial stretching. A thermal treatment may be effected after the stretching process. Films thus obtained have tensile strength over 6 kgf/mm.sup.2 in the stretching direction, Young's modulus over 220 kgf/mm.sup.2 in the stretching direction and transparency to visible light over 90%.
摘要翻译：可以通过熔融挤出聚-L-乳酸和/或聚-D-乳酸形成膜来制备具有改善的拉伸强度和杨氏模量的取向膜，并且在将膜快速冷却后，在高于玻璃化转变温度并低于冷结晶温度的温度下进行拉伸。拉伸可以通过具有恒定宽度，连续双轴拉伸或同时双轴拉伸的单轴拉伸的方法来实现。在拉伸过程之后可进行热处理。由此获得的拉伸强度在拉伸方向上的拉伸强度超过6kgf / mm2，拉伸方向的拉伸强度超过220kgf / mm2，透明度可见光超过90％。

2. 发明授权

US6060622A Methods of reproducing lactic acid components by using lactic acid based by-products 失效
标题翻译：使用乳酸副产物再生乳酸成分的方法
公开(公告)号：US6060622A
公开(公告)日：2000-05-09
申请号：US957379
申请日：1997-10-24
申请人： Hisashi Okuyama , Makoto Ogaito , Tatsushi Kawamoto , Takashi Kawabe , Yasumasa Horibe
发明人： Hisashi Okuyama , Makoto Ogaito , Tatsushi Kawamoto , Takashi Kawabe , Yasumasa Horibe
IPC分类号： C07D319/12 , B01J31/04 , C07B55/00 , C07B61/00 , C07C67/465 , C07C69/708 , C08G63/06 , C08G63/08 , C08J11/00 , C08J11/10 , C07C59/08
CPC分类号： C08G63/06
摘要： A lactic acid based by-product formed in a process of producing a lactic acid based composition is subjected to racemization in the presence or absence of a catalyst to thereby obtain a lactic acid component having substantially optical inactivity. Then, lactide or polylactic acid having optical inactivity can be obtained from the lactic acid component having the optical inactivity. The obtained lactide or polylactic acid is mixed with lactide or polylactic acid having an optical purity in a range of 90 to 100% e.e. at a predetermined ratio to thereby obtain lactide or polylactic acid having a desired optical purity.
摘要翻译：在生产乳酸基组合物的过程中形成的乳酸基副产物在催化剂存在或不存在下进行外消旋化，从而获得具有基本上不活泼的乳酸成分。然后，可以从具有光学不活动性的乳酸成分获得具有光学不活动性的丙交酯或聚乳酸。将得到的丙交酯或聚乳酸与光学纯度为90〜100％e.e。的丙交酯或聚乳酸混合。从而获得具有所需光学纯度的丙交酯或聚乳酸。

3. 发明授权

US5801255A Method for producing lactide and apparatus used therefor 失效
标题翻译：制备丙交酯的方法及其用途
公开(公告)号：US5801255A
公开(公告)日：1998-09-01
申请号：US690787
申请日：1996-08-01
申请人： Hitomi Ohara , Makoto Ogaito
发明人： Hitomi Ohara , Makoto Ogaito
IPC分类号： C07D319/12
CPC分类号： C07D319/12
摘要： The method for producing lactide includes the steps of (a) synthesizing lactide using lactic acid as a starting material; (b) discharging in gaseous states lactide synthesized and impurities formed upon synthesis in step (a); (c) liquefying gaseous components in step (b) and solidifying only lactide, to thereby separate the impurities from the thus-obtained solidified lactide; and (d) returning the separated impurities in step (c) back to the synthesis step (a). The apparatus used for the above production includes (a) a reactor for carrying out synthesis of lactide; (b) a means for gasifying synthesized lactide and impurities formed upon synthesis in the reactor (a) and discharging the resulting gaseous components; (c) a means for cooling the gaseous components to liquefy the gaseous components obtained by the means (b) and solidify only lactide; and (d) a pipe for returning to the reactor (a) components which are not solidified by the means (c).
摘要翻译：制备丙交酯的方法包括以下步骤：（a）使用乳酸作为原料合成丙交酯; （b）在气相状态下排出合成的丙交酯和在步骤（a）中合成时形成的杂质; （c）在步骤（b）中液化气态组分，仅固化丙交酯，从而分离出由此得到的固化丙交酯的杂质; 和（d）将步骤（c）中的分离的杂质返回到合成步骤（a）。用于上述生产的装置包括（a）用于进行丙交酯合成的反应器; （b）用于气化合成的丙交酯和在反应器（a）中合成时形成的杂质并排出所得气体组分的装置; （c）用于冷却气态组分以使通过（b）所获得的气态组分液化并仅固化丙交酯的装置; 和（d）用于使反应器（a）返回的管道（a）未被固定（c）固化的部件。

4. 发明授权

US06313319B1 Method for purifying lactide and lactide for food additives 失效
标题翻译：纯化丙交酯和丙交酯食品添加剂的方法
公开(公告)号：US06313319B1
公开(公告)日：2001-11-06
申请号：US09554101
申请日：2000-05-24
申请人： Hitomi Ohara , Hisashi Okuyama , Makoto Ogaito , Yasuhiro Fujii , Tatsushi Kawamoto , Takashi Kawabe , Yasumasa Horibe
发明人： Hitomi Ohara , Hisashi Okuyama , Makoto Ogaito , Yasuhiro Fujii , Tatsushi Kawamoto , Takashi Kawabe , Yasumasa Horibe
IPC分类号： C07D31912
CPC分类号： A23J3/08 , A23C11/06 , A23C20/00 , A23C20/025 , A23J3/16 , A23L3/3508 , A23L13/42 , A23L13/65 , A23L15/30 , A23L17/70
摘要： A crude lactide in a solid state or in an at least partially molten state is brought into contact with ethanol to form a slurry mixture, and then a solid form this slurry mixture is separated to yield a purified lactide having a high purity. A crude lactide is recrystallized from a non-denatured or denatured ethanol to obtain a lactide for a food additive. A lactide is applied widely to food additives. A coagulating agent for an animal and/or vegetable protein containing an optically active lactide as a main component, a food foaming agent containing a lactide as a main component, a food preservative containing a lactide as a main component and a pH regulating agent containing a lactide as a main component are provided.
摘要翻译：将固态或至少部分熔融状态的粗丙交酯与乙醇接触以形成浆料混合物，然后将固体形式分离出该浆料混合物，得到纯度高的纯化丙交酯。粗丙交酯从非变性或变性乙醇中重结晶，得到食品添加剂的丙交酯。丙交酯广泛应用于食品添加剂。用于含有光学活性丙交酯作为主要成分的动物和/或植物蛋白质的凝结剂，以丙交酯为主要成分的食品发泡剂，含有丙交酯作为主要成分的食品防腐剂和含有丙交酯作为主要成分。

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