公开(公告)号：US20050165206A1

公开(公告)日：2005-07-28

申请号：US10511297

申请日：2003-04-11

申请人： Gerald Rafler ,  Inna Bechthold ,  Horst Riekert

发明人： Gerald Rafler ,  Inna Bechthold ,  Horst Riekert

IPC分类号： C08G63/82 ,  C08K5/5313 ,  C08L67/04 ,  C08G63/02

CPC分类号： C08G63/823 ,  C08K5/5313 ,  C08L67/04

摘要： In a method for producing a homopolyester or copolyester obtainable from at least one cyclic monomer, the at least one cyclic monomer is polymerized in the presence of an initiator. The initiator is selected from organo-tin compounds, tin carboxylates, and tin alkoxides of the oxidation state II or IV that may contain optionally hydroxy groups. At the latest at a point in time when a desired degree of polymerization is reached, a phosphinic acid and/or a phosphinic derivative of the formula (R1)(R2)P(═O)X is added, wherein R1 and R2 each are independently of one another hydrogen, alkyl, aryl, or hetero aryl, and X is —OR3 or —NR1R2, wherein R3 is hydrogen, alkyl, aryl, MI or ½MII and MI is an alkali metal ion and MII is an alkaline earth metal ion and wherein the substituents R1 and R2 have the meaning indicated above.

摘要翻译： 在由至少一种环状单体得到的均聚酯或共聚聚酯的制造方法中，至少一种环状单体在引发剂的存在下聚合。 引发剂选自可含有任选羟基的氧化态II或IV的有机锡化合物，羧酸锡和烷氧化锡。 最近在达到所需聚合度的时间点，式（R 1）2的次膦酸和/或次膦酸衍生物（R 1 H 2） ）P（-O）X，其中R 1和R 2各自彼此独立地为氢，烷基，芳基或杂芳基，X为 - OR 3或-NR 1 R 2，其中R 3是氢，烷基，芳基，M ^{I 或1/2M II和M I L是碱金属离子，M II是碱土金属离子，其中， 取代基R 1和R 2 2具有上述含义。}

公开(公告)号：US06657042B2

公开(公告)日：2003-12-02

申请号：US10102064

申请日：2002-03-19

申请人： Gerald Rafier ,  Jacqueline Lang ,  Monika Jobmann ,  Inna Bechthold

发明人： Gerald Rafier ,  Jacqueline Lang ,  Monika Jobmann ,  Inna Bechthold

IPC分类号： C08G6382

CPC分类号： C08G63/823 ,  C08G63/08

摘要： A process is provided for manufacturing homo- and copolyesters of lactic acid by ring scission polymerization of its cyclic monomers in the presence of an initiator. Polymerization is carried out in the molten phase in the presence of an initiator system containing a compound of tin and at least one additional initiator chosen from the compounds of metal of the fourth subgroup.

摘要翻译： 提供了一种通过其引发剂存在下环状单体的环断裂聚合来制备乳酸的均聚物和共聚酯的方法。 在含有锡化合物和至少一种另外的引发剂的引发剂体系存在下，在熔融相中进行聚合，所述引发剂选自第四亚组的金属化合物。