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    • 41. 发明申请
    • PROCESS FOR PREPARING POLYAMIDES
    • 制备聚氨酯的方法
    • US20120245308A1
    • 2012-09-27
    • US13514364
    • 2010-12-03
    • Faissal-Ali El-ToufailiPhilippe DesboisAndreas WollnySven LawrenzChristian Schmidt
    • Faissal-Ali El-ToufailiPhilippe DesboisAndreas WollnySven LawrenzChristian Schmidt
    • C08G69/28C08G69/26
    • C08G69/265C08G69/28
    • The present invention relates to a process for preparing a polyamide based on dicarboxylic acids and diamines, comprising the following stages: A) providing an aqueous monomer mixture composed of dicarboxylic acids and diamines, where the molar ratio of dicarboxylic acids to diamines is adjusted such that, at the outlet of stage C), there is a molar deficiency of dicarboxylic acids or diamines of 1 to 10 mol%, based on the respective other component, B) transferring the aqueous mixture from stage A) into a continuous evaporator reactor in which diamines and dicarboxylic acids are converted at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar, C) transferring the mixture from stage B) into a separator which is operated at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar with removal of gaseous components, D) transferring the mixture from stage C) together with diamine or dicarboxylic acid in an amount suitable for compensation for the molar deficiency into a tubular reactor which is operated at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar, for a residence time in the range from 10 seconds to 30 minutes, E) transferring the mixture from stage D) into an extruder which is operated at a temperature in the range from 150 to 400° C. for a residence time in the range from 10 seconds to 30 minutes with removal of gaseous components through venting orifices.
    • 本发明涉及一种制备基于二羧酸和二胺的聚酰胺的方法,包括以下步骤:A)提供由二羧酸和二胺组成的含水单体混合物,其中二羧酸与二胺的摩尔比被调整为使得 ,在阶段C)的出口处,基于各自的其它组分,存在摩尔不足的二羧酸或二胺的1至10摩尔%,B)将水性混合物从阶段A)转移到连续的蒸发器反应器中,其中 二胺和二羧酸在100至370℃的温度和1至50巴的压力范围内转化,C)将混合物从阶段B)转移到分离器中,该分离器在 范围为100至370℃,压力为1至50巴,除去气态组分,D)将混合物与阶段C)一起转移至二胺或二羧酸的量 适合于将摩尔不足补偿到在100至370℃的温度和1至50巴的压力范围内操作的管式反应器中,停留时间在10秒至 30分钟,E)将混合物从阶段D)转移到挤出机中,该挤出机在150-400℃的温度下操作,停留时间在10秒至30分钟之间,同时除去气体成分 通风孔。