公开(公告)号：US3842047A

公开(公告)日：1974-10-15

申请号：US34403673

申请日：1973-03-22

申请人： PUSZTASZERI S

发明人： PUSZTASZERI S

IPC分类号： C08G69/24 ,  C08G20/18

CPC分类号： C08G69/24

摘要： 1. PROCESS FOR THE POLYMERIZATION OF SUBSTANTIALLY PURE, SUBSTANTIALLY ANHYDROUS 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF: (A) MIXING THE 2-PYRROLIDONE WITH A SUBSTANTIALLY ANHYDROUS ALKALINE REACTANT SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALI METAL HYDROXIDES AND ALKALI METAL BICARBONATES IN A MOLE RATIO OF FROM ABOUT 10:1 TO 27:1; (B) HEATING SAID MIXTURE UNDER VACUUM TO A TEMPERATURE OF FROM 100* TO 120*C. TO REACTED THE ALKALINE REACTANT WITH THE 2-PYRROLIDINE AND THE ALKALI METAL SALT COMPRISING 2-PYRROLIDONE AND THE ALKALI METAL SALT OF 2-PYRROLIDONE AND TO DISTILL OFF THE WATER FORMED IN THE REACTION MIXTURE; (C) COOLING THE REACTION MIXTURE TO ROOM TEMPERATURE ; (D) BUBBLING A DRY GAS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, NITROGEN DIOXIDE AND SULFUR DIOXIDE THROUGH THE PREVIOUSLY COOLED REACTION MIXTURE IN AN AMOUNT SUFFICIENT TO REACT WITH SUBSTANTIALLY ALL OF THE METAL IN THE 2-PYRROLIDONE SALT; (E) MIXING THE MIXTURE OF STEP (D) WITH BETWEEN ABOUT 1-5% BY WEIGHT, BASED UPON THE WEIGHT OF THE REACTION MIXTURE, OF AN INERT DRYING AGENT; AND (F) HEATING TO A TEMPERATURE OF FROM 48* C TO 52*C. FOR AT LEAST ABOUT 40 HOURS TO PRODUCE A FILAMENT FORMING POLYMER.