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公开(公告)号：US08552209B2
公开(公告)日：2013-10-08
申请号：US13203075
申请日：2010-03-12
IPC分类号： C07D319/00
CPC分类号： C07D319/12
摘要： Lactic acid equivalents are recovered from a starting lactide stream by catalytically racemizing a portion of the lactide in the stream at a temperature of 180° C. or below. This increases the proportion of two species of lactide (i.e., at least two of S,S-, R,R- or meso-lactide) at the expense of the third species. The racemized mixture so obtained can be separated to recover some or all of one or more of the lactide species from the remaining lactide species, by a process such as melt crystallization or distillation. Impurities in the starting lactide stream usually are retained mostly in the remaining meso-lactide, so a highly purified S,S- and/or R,R-lactide stream can be produced in this manner. Such a purified S,S- and R,R-lactide stream is suitable for polymerization to form a polylactide.
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公开(公告)号：US20120095240A1
公开(公告)日：2012-04-19
申请号：US13203075
申请日：2010-03-12
IPC分类号： C07D319/12
CPC分类号： C07D319/12
摘要： Lactic acid equivalents are recovered from a starting lactide stream by catalytically racemizing a portion of the lactide in the stream at a temperature of 180° C. or below. This increases the proportion of two species of lactide (i.e., at least two of S,S-, R,R- or meso-lactide) at the expense of the third species. The racemized mixture so obtained can be separated to recover some or all of one or more of the lactide species from the remaining lactide species, by a process such as melt crystallization or distillation. Impurities in the starting lactide stream usually are retained mostly in the remaining meso-lactide, so a highly purified S,S- and/or R,R-lactide stream can be produced in this manner. Such a purified S,S- and R,R-lactide stream is suitable for polymerization to form a polylactide.
摘要翻译： 通过在180℃或更低的温度下在流中将一部分丙交酯催化外消旋化，从起始丙交酯流中回收乳酸当量。 这增加了两种种类的丙交酯（即S，S-，R，R-或内消旋丙交酯中的至少两种）的比例，牺牲了第三种物质。 如此获得的外消旋化混合物可以被分离，以通过诸如熔融结晶或蒸馏的方法从剩余的丙交酯物质中回收一种或多种一种或多种丙交酯物质。 起始丙交酯流中的杂质通常保留在剩余的内消旋丙交酯中，因此可以以这种方式制备高纯度的S，S-和/或R，R-丙交酯流。 这种纯化的S，S-和R，R-丙交酯流适用于聚合以形成聚丙交酯。
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3.发明授权公开(公告)号：US06326458B1
公开(公告)日：2001-12-04
申请号：US08133445
申请日：1993-10-07
申请人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
发明人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
IPC分类号： C08G6308
CPC分类号： C08G63/08 , C07D319/12 , C08G63/06
摘要： A process for the continuous production of substantially purified lactide and lactide polymers from lactic acid or an ester of lactic acid including the steps of forming crude polylactic acid, preferably in the presence of a catalyst means in the case of the ester of lactic acid, to form a condensation reaction by-product and polylactic acid, and depolymerizing the polylactic acid in a lactide reactor to form crude lactide, followed by subsequent purification of the crude lactide in a distillation system. A purified lactide is then polymerized to form lactide polymers.
摘要翻译： 从乳酸或乳酸酯连续生产基本上纯化的丙交酯和丙交酯聚合物的方法，包括以下步骤：优选在乳酸酯的情况下，在催化剂存在下，形成粗乳酸， 形成缩合反应副产物和聚乳酸，并将聚乳酸在丙交酯反应器中解聚以形成粗丙交酯，随后在蒸馏系统中纯化粗丙交酯。 然后将纯化的丙交酯聚合以形成丙交酯聚合物。
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4.发明授权Polylactic acid stereocomplex compositions and methods for making and using same 有权聚乳酸立体络合物组合物及其制备和使用方法公开(公告)号：US08962791B2
公开(公告)日：2015-02-24
申请号：US12445288
申请日：2007-10-24
IPC分类号： C08G63/08 , C08L67/04 , B29C47/00 , B29C51/00 , B29C51/02 , B29C47/88 , B29K67/00 , C08L25/14
CPC分类号： C08L67/04 , B29C47/0019 , B29C47/0021 , B29C47/8805 , B29C47/8815 , B29C47/884 , B29C51/002 , B29C51/02 , B29K2067/046 , B29K2995/0017 , B29K2995/004 , B29K2995/006 , C08L25/14 , C08L2205/02 , C08L2666/02 , C08L2666/18
摘要： Thermoformed PLA stereocomplex parts are made using a PLA stereocomplex composition having a highest crystallization melting temperature from 200 to 215° C. The stereocomplex composition preferably has less than 5 J/g of lower melting (160 to 190° C.) crystallites. The stereocomplex can be pre-annealed in various ways to reduce thermoforming cycle times. The stereocomplex forms parts with low haze and good thermal resistance, at reasonable cycle times.
摘要翻译： 热成型PLA立体络合物部分使用具有最高结晶熔融温度为200至215℃的PLA立体络合物组合物制备。立构复合组合物优选具有低于5J / g的较低熔点（160至190℃）的微晶。 立体复合物可以以各种方式预退火以减少热成型循环时间。 在合理的循环时间下，立体络合物形成低雾度和良好耐热性的部分。
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5.发明申请POLYLACTIC ACID STEREOCOMPLEX COMPOSITIONS AND METHODS FOR MAKING AND USING SAME 有权聚酸酯立体异构体组合物及其制备和使用方法公开(公告)号：US20100152415A1
公开(公告)日：2010-06-17
申请号：US12445288
申请日：2007-10-24
CPC分类号： C08L67/04 , B29C47/0019 , B29C47/0021 , B29C47/8805 , B29C47/8815 , B29C47/884 , B29C51/002 , B29C51/02 , B29K2067/046 , B29K2995/0017 , B29K2995/004 , B29K2995/006 , C08L25/14 , C08L2205/02 , C08L2666/02 , C08L2666/18
摘要： Thermoformed PLA stereocomplex parts are made using a PLA stereocomplex composition having a highest crystallization melting temperature from 200 to 215° C. The stereocomplex composition preferably has less than 5 J/g of lower melting (160 to 190° C.) crystallites. The stereocomplex can be pre-annealed in various ways to reduce thermoforming cycle times. The stereocomplex forms parts with low haze and good thermal resistance, at reasonable cycle times.
摘要翻译： 热成型PLA立体络合物部分使用具有最高结晶熔融温度为200至215℃的PLA立体络合物组合物制备。立构复合组合物优选具有低于5J / g的较低熔点（160至190℃）的微晶。 立体复合物可以以各种方式预退火以减少热成型循环时间。 在合理的循环时间下，立体络合物形成低雾度和良好耐热性的部分。
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6.发明授权Continuous process for manufacture of lactide polymers with controlled optical purity 有权用于制造具有受控光学纯度的丙交酯聚合物的连续方法公开(公告)号：US06277951B1
公开(公告)日：2001-08-21
申请号：US09351653
申请日：1999-07-13
申请人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
发明人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
IPC分类号： C08G6308
摘要： A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.
摘要翻译： 从乳酸连续生产聚丙交酯聚合物的方法，该方法结合去除水或溶剂载体以将乳酸进料浓缩，然后聚合成低分子量预聚物。 将该预聚物加入反应器中，在该反应器中加入催化剂以促进产生丙交酯，即聚乳酸的解聚产物。 生成的丙交酯以其中除去水和其它杂质的液体或蒸气连续供入蒸馏系统。 将所得纯化液体丙交酯直接进料至聚合过程。
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公开(公告)号：US6005067A
公开(公告)日：1999-12-21
申请号：US14988
申请日：1998-01-28
申请人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
发明人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
摘要： A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.
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公开(公告)号：US08674056B2
公开(公告)日：2014-03-18
申请号：US13203211
申请日：2010-03-12
IPC分类号： C08G63/08
CPC分类号： C07D319/12 , C08G63/08
摘要： An S,S- and R,R-lactide stream suitable for polymerization is prepared by producing a low molecular weight poly(lactic acid), depolymerizing the low molecular weight poly(lactic acid) to form a mixture of S,S-, R,R- and meso-lactide, and separating meso-lactide from this mixture to form an S,S- and R,R-lactide stream. Meso-lactide is recycled into the process, and shifts the mole fractions of the lactides in the lactide mixture that is produced.
摘要翻译： 适用于聚合的S，S-和R，R-丙交酯流通过生产低分子量聚（乳酸）制备，解聚低分子量聚（乳酸）以形成S，S-，R ，R-和内消旋丙交酯，并从该混合物中分离内消旋丙交酯以形成S，S-和R，R-丙交酯流。 将内消旋丙内酯循环到该方法中，并使所生成的丙交酯混合物中的丙交酯的摩尔分数发生变化。
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公开(公告)号：US20110306749A1
公开(公告)日：2011-12-15
申请号：US13203211
申请日：2010-03-12
CPC分类号： C07D319/12 , C08G63/08
摘要： An S, S- and R,R-lactide stream suitable for polymerization is prepared by producing a low molecular weight poly(lactic acid), depolymerizing the low molecular weight poly(lactic acid) to form a mixture of S, S-, R,R- and meso-lactide, and separating meso-lactide from this mixture to form an S, S- and R,R-lactide stream. Meso-lactide is recycled into the process, and shifts the mole fractions of the lactides in the lactide mixture that is produced.
摘要翻译： 适用于聚合的S，S-和R，R-丙交酯流通过生产低分子量聚（乳酸）制备，解聚低分子量聚（乳酸）以形成S，S-，R ，R-和内消旋丙交酯，并从该混合物中分离内消旋丙交酯以形成S，S-和R，R-丙交酯流。 将内消旋丙内酯循环到该方法中，并使所生成的丙交酯混合物中的丙交酯的摩尔分数发生变化。
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