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    Method for producing polyamide
    54.
    发明专利
    Method for producing polyamide 有权

    公开(公告)号：JP5304437B2

    公开(公告)日：2013-10-02

    申请号：JP2009125297

    申请日：2009-05-25

    申请人： 三菱瓦斯化学株式会社

    发明人： 英之 黒瀬 ,  克巳 篠原 ,  稔 菊地 ,  智道 神田

    IPC分类号： C08G69/28

    CPC分类号： B01F7/00116 ,  B01F7/00166 ,  B01F7/00291 ,  B01F7/00408 ,  B01F7/005 ,  B01J19/0066 ,  B01J19/18 ,  B01J2219/00029 ,  B01J2219/00189 ,  C08G69/28

    摘要： A process for producing polyamide which comprises directly melt polymerizing a diamine component, which comprises 70% by mole or more of xylylenediamine comprising 20% by mole or more of para-xylylenediamine, and a dicarboxylic acid component in the substantial absence of solvents in a reaction apparatus of the batch type, wherein a stirring apparatus disposed in the reaction apparatus and used for stirring the melted polymer in the apparatus comprises: (1) a rotating shaft connected to a driving member for stirring, (2) two or more stirring rods disposed in the substantially vertical direction which are cylinder-shaped members or plate-shaped members moving along the circumference of a circle having the center at the rotating shaft, and (3) a connecting member which connects the rotating shaft and the stirring rods; distances between the center line of the rotating shaft and center lines of the two or more stirring rods are each 15% or greater of the inner diameter of the reaction apparatus; the connecting member and the rotating shaft are disposed above the liquid surface of the melted polymer; and stirring is conducted in a manner such that the circumferential speed of the stirring rods is 30 m/minute or greater.