发明授权
US4465821A Process for the continuous production of polyamides 失效
聚酰胺连续生产工艺

Process for the continuous production of polyamides
摘要:
A process for the production of polyamides by the polycondensation of aqueous solutions of salts of diamines and dicarboxylic acids by continuously introducing the aqueous salt solution into a precondensate melt under atmospheric pressure and simultaneously distilling off the water and maintaining the temperature of the melt at a minimum temperature of 180.degree. C.
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