公开(公告)号：US09670314B2

公开(公告)日：2017-06-06

申请号：US14421695

申请日：2013-08-14

申请人： PURAC BIOCHEM BV ,  SULZER CHEMTECH AG

发明人： Siebe Cornelis De Vos ,  Gerrit Gobius Du Sart ,  Robert Edgar Haan ,  Francois Loviat

IPC分类号： C08G63/78 ,  C08G63/85 ,  C08G63/08 ,  C08G63/82 ,  C08G63/06 ,  C08G63/91

CPC分类号： C08G63/85 ,  C08G63/06 ,  C08G63/08 ,  C08G63/78 ,  C08G63/823 ,  C08G63/91 ,  C08G63/912

摘要： A method for manufacturing poly(2-hydroxyalkanoic acid) included the steps of a) mixing a cyclic diester of a 2-hydroxyalkanoic acid and a polymerization catalyst, b) polymerizing the cyclic diester to form poly(2-hydroxyalkanoic acid) in liquid phase, c) adding a phosphoric acid ester as a catalyst deactivating agent to the liquid phase, d) applying a devolatilization step to the liquid phase, and e) allowing the poly(2-hydroxyalkanoic acid) to solidify. The catalyst deactivating agent is added after the devolatilization step is applied. The method results in an improved melt stability of the manufactured polymer.

公开(公告)号：US20150210802A1

公开(公告)日：2015-07-30

申请号：US14421695

申请日：2013-08-14

申请人： PURAC Biochem BV ,  Sulzer Chemtech AG

发明人： Siebe Cornelis De Vos ,  Gerrit Gobius Du Sart ,  Robert Edgar Haan ,  Francois Loviat

IPC分类号： C08G63/85 ,  C08G63/91

CPC分类号： C08G63/85 ,  C08G63/06 ,  C08G63/08 ,  C08G63/78 ,  C08G63/823 ,  C08G63/91 ,  C08G63/912

摘要： A method for manufacturing poly(2-hydroxyalkanoic acid) included the steps of a) mixing a cyclic diester of a 2-hydroxyalkanoic acid and a polymerization catalyst, b) polymerizing the cyclic diester to form poly(2-hydroxyalkanoic acid) in liquid phase, c) adding a phosphoric acid ester as a catalyst deactivating agent to the liquid phase, d) applying a devolatilisation step to the liquid phase, and e) allowing the poly(2-hydroxyalkanoic acid) to solidify. The catalyst deactivating agent is added after the devolatilisation step is applied. The method results in an improved melt stability of the manufactured polymer.

摘要翻译： 制备聚（2-羟基链烷酸）的方法包括以下步骤：a）将2-羟基链烷酸的环状二酯和聚合催化剂混合，b）使环状二酯聚合以形成液相中的聚（2-羟基链烷酸） c。将磷酸酯作为催化剂减活剂添加到液相中，d）将脱挥发分步骤加到液相中，e）使聚（2-羟基链烷酸）固化。 在脱挥发分步骤之后加入催化剂失活剂。 该方法导致所制备的聚合物的熔体稳定性得到改善。

公开(公告)号：US10240007B2

公开(公告)日：2019-03-26

申请号：US15529039

申请日：2015-12-02

申请人： PURAC BIOCHEM BV

发明人： Siebe Cornelis De Vos ,  Robert Edgar Haan ,  Geraldus Gerardus Johannes Schennink

IPC分类号： C08J3/00 ,  B29C45/72 ,  B29C45/00 ,  C08J5/00 ,  C08L67/04 ,  B29K67/00

摘要： A method for preparing a shaped polylactide article including stereocomplex polylactide and to a shaped article obtainable by the method. In particular the method comprises melt mixing and solidifying poly-L-lactide (PLLA) and poly-D-lactide (PDLA) homopolymers in a weight ratio whereby one of the homopolymers is in excess, subsequently solid mixing the so obtained blend with additional homopolymer, and shaping the obtained solids mixture.