公开(公告)号：US4963650A

公开(公告)日：1990-10-16

申请号：US417770

申请日：1989-10-06

申请人： Elvina Z. Bokareva ,  Jelena V. Schinkorenko ,  Viktor V. Terenko ,  Larisa A. Nosova ,  Garri I. Faidel ,  Sijar N. Nurmuchomedov ,  Anatolij V. Beljakov ,  Ivan M. Vlasov ,  Anton Fuerst ,  Heinz Herrmann ,  Eckart Pantzer ,  Bernhard Stoehrer ,  Eberhard Uhland ,  Hans Werner

发明人： Elvina Z. Bokareva ,  Jelena V. Schinkorenko ,  Viktor V. Terenko ,  Larisa A. Nosova ,  Garri I. Faidel ,  Sijar N. Nurmuchomedov ,  Anatolij V. Beljakov ,  Ivan M. Vlasov ,  Anton Fuerst ,  Heinz Herrmann ,  Eckart Pantzer ,  Bernhard Stoehrer ,  Eberhard Uhland ,  Hans Werner

IPC分类号： C08G69/16 ,  C08G69/28 ,  C08G69/46

CPC分类号： C08G69/16 ,  C08G69/28 ,  C08G69/46

摘要： A process for separating low molecular weight compounds from a crude polycaproamide melt comprises heat treating the melt in vacuo with superheated steam, in an extruder having a plurality of degassing zones, under precise conditions of temperature, pressure and configuration, such that the occurrence of side reactions and dehydration of the melt are substantially eliminated, the molecular weight of the polymer during the heat treatment in vacuo, during transport and subsequent processing remains substantially unchanged, a residual content of low molecular weight compounds of .ltoreq.1.8% is achieved, and the operating flexibility of the process is increased.

摘要翻译： 从粗制聚己内酰胺熔体中分离低分子量化合物的方法包括在具有多个脱气区域的挤出机中，在温度，压力和构型的精确条件下，用过热蒸汽在真空中热处理熔体，使得发生侧面 基本上消除了熔体的反应和脱水，在真空中，在运输和随后的加工过程中，热处理期间聚合物的分子量基本上保持不变，实现了低分子量化合物的残留含量