公开(公告)号：US5128442A

公开(公告)日：1992-07-07

申请号：US681255

申请日：1991-04-08

申请人： Gunter Pipper ,  Wolfgang F. Mueller ,  Harald Dauns

发明人： Gunter Pipper ,  Wolfgang F. Mueller ,  Harald Dauns

IPC分类号： C08G69/30 ,  C08G69/28

CPC分类号： C08G69/28

摘要： A process for the preparation of a linear polyamide by reacting the appropriate dicarboxylic acid and diamine in a liquid reaction medium with the addition of a catalytically effective phosphorus compound, removing the reaction medium to give a solid salt, precondensing the latter in the solid phase at a temperature of from 140.degree. C. to 5.degree. C. below the melting point of the salt and continuing condensation at a temperature above that used for the precondensation until the desired degree of condensation is reached.

摘要翻译： 通过在液体反应介质中使合适的二羧酸和二胺与添加催化有效的磷化合物反应来制备线性聚酰胺的方法，除去反应介质以得到固体盐，将固相的预冷凝 温度低于盐的熔点为140℃至5℃，并在高于用于预缩合直到达到所需缩合度的温度下继续冷凝。