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    Method for continuous production of polyamide
    12.
    发明授权
    Method for continuous production of polyamide 有权
    连续生产聚酰胺的方法

    公开(公告)号：US07381788B2

    公开(公告)日：2008-06-03

    申请号：US10525740

    申请日：2003-08-27

    申请人： Yasuhito Tsujii ,  Gaku Maruyama ,  Kaoru Ogawa ,  Yoshinori Takada ,  Kazuhisa Koishi ,  Kenta Susuki

    发明人： Yasuhito Tsujii ,  Gaku Maruyama ,  Kaoru Ogawa ,  Yoshinori Takada ,  Kazuhisa Koishi ,  Kenta Susuki

    IPC分类号： C08G69/00 ,  C08G69/28 ,  B29C47/76

    CPC分类号： C08G69/04 ,  C08G69/28

    摘要： Provided is a continuous production method of a polyamide with stabilized polymerization degree and good quality, particularly an aromatic-containing polyamide. A continuous production method of a polyamide, comprising (a) a raw material preparation step of individually melting a diamine and a dicarboxylic acid, or producing a salt of amine and carboxylic acid in water, (b) a raw material introduction step of continuously introducing the prepared raw materials into a tubular reaction apparatus, (c) an amidation step of passing the introduced raw materials through the tubular reaction apparatus, thereby effecting amidation to obtain a reaction mixture containing an amidated product and a condensed water, (d) an initial polymerization step of introducing the reaction mixture into a continuous reaction apparatus capable of separation and removal of water, and elevating the polymerization degree while separating and removing water at a temperature higher than the melting point of the finally obtained polyamide to obtain a polyamide prepolymer, and (e) a final polymerization step of introducing the polyamide prepolymer into a continuous reaction apparatus capable of separation and removal of water, and further elevating the polymerization degree at a temperature higher than the melting point of the finally obtained polyamide to obtain a polyamide adjusted to a desired relative viscosity [RV].

    摘要翻译： 提供了具有稳定的聚合度和良好质量的聚酰胺的连续制备方法，特别是含芳族聚酰胺。 一种聚酰胺的连续制造方法，其特征在于，包括：（a）将二胺和二羧酸单独熔融或在水中生成胺和羧酸盐的原料制备工序，（b）原料引入工序， 所制备的原料进入管状反应装置，（c）使引入的原料通过管状反应装置的酰胺化步骤，从而进行酰胺化以获得含有酰胺化产物和冷凝水的反应混合物，（d）初始 将反应混合物引入能够分离和除去水的连续反应装置的聚合步骤，并且在高于最终获得的聚酰胺的熔点的温度下分离和除去水以提高聚合度以获得聚酰胺预聚物，以及 （e）将聚酰胺预聚物引入连续反应ap的最终聚合步骤 能够分离和除去水，并且在高于最终获得的聚酰胺的熔点的温度下进一步提高聚合度，以获得调节至所需相对粘度[RV]的聚酰胺。