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公开(公告)号：US20080033143A1
公开(公告)日：2008-02-07
申请号：US11787771
申请日：2007-04-18
申请人： Yasuto Tachibana , Minoru Noda , Toru Nishimura
发明人： Yasuto Tachibana , Minoru Noda , Toru Nishimura
IPC分类号： C08G69/16
摘要： A method for producing a polyamide prepolymer including heating an aqueous solution of caprolactam having a water content of from 2 to 20% by weight, under pressure at a temperature of from 200 to 330° C. for 1 to 30 minutes, to produce polyamide prepolymer having an amino end group content of at least 0.1 mmol/g and a cyclic oligomer content of at most 0.6% by weight, and a conversion at most 40% by weight.
摘要翻译： 一种制备聚酰胺预聚物的方法，包括在200-330℃的温度下加压水含量为2-20重量％的己内酰胺水溶液1至30分钟，以制备聚酰胺预聚物 具有至少0.1mmol / g的氨基端基含量和至多0.6重量％的环状低聚物含量，和至多40重量％的转化率。
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公开(公告)号：US06169161A
公开(公告)日：2001-01-02
申请号：US09281625
申请日：1999-03-31
申请人： Yasuto Tachibana , Shigeru Okita , Koji Onishi
发明人： Yasuto Tachibana , Shigeru Okita , Koji Onishi
IPC分类号： C08G6914
摘要： For producing a polyamide having an unreacted caprolactam content of from 0 to 0.5% by weight and an oligomer content of from 0 to 1.25% by weight and having a relative viscosity in a 0.01 g/ml solution of sulfuric acid at 25° C. of from 2.2 to 8.0, combined is a first step of polymerizing a starting material comprising caprolactam, under atmospheric pressure to prepare a polymerization product having an unreacted caprolactam content of not larger than 25% by weight and an oligomer content falling between 0 and 1.8% by weight, and a second step of heating the polymerization product prepared in the first step, at a temperature T satisfying the following formula (1) and under reduced pressure to thereby remove the unreacted caprolactam and the oligomer from it: Glass transition point of polyamide
摘要翻译： 为了制备具有0至0.5重量％的未反应己内酰胺含量和0至1.25重量％的低聚物含量并且在0.01克/毫升硫酸溶液中的相对粘度在25℃下的聚酰胺 从2.2至8.0组合，是在大气压下聚合包含己内酰胺的起始材料的第一步骤，以制备具有不大于25重量％的未反应己内酰胺含量不低于25重量％的低聚物含量，低聚物含量为0-1.8％的聚合产物，通过 重量，第二步骤，在第一步骤中制备的聚合产物，在满足下式（1）的温度下，在减压下加热，从而除去未反应的己内酰胺及其低聚物：
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