Method for the production of polyamides in extruders
    10.
    发明授权
    Method for the production of polyamides in extruders 有权
    在挤出机中生产聚酰胺的方法

    公开(公告)号:US08765902B2

    公开(公告)日:2014-07-01

    申请号:US12665585

    申请日:2008-06-11

    IPC分类号: C08G69/28

    摘要: In a process for preparing a polyamide based on dicarboxylic acids and diamines in an extruder, a solid mixture comprising a monomer mixture composed of 50 mol % of dicarboxylic acid mixture composed of from 60 to 88 % by weight of terephthalic acid and from 12 to 40% by weight of isophthalic acid, in which up to 20% by weight of the dicarboxylic acid mixture may also be replaced by other dicarboxylic acids, and 50 mol % of hexamethylenediamine which may be up to 20% by weight replaced by other C2-30-diamines, in a corotatory twin-screw extruder for a residence time of from 10 seconds to 30 minutes, is heated to a temperature in the range from 150 to 400° C. while removing steam and if appropriate diamines through venting orifices.

    摘要翻译: 在挤出机中制备基于二羧酸和二胺的聚酰胺的方法中,包含由50摩尔%的由对苯二甲酸的重量比为60-88%的二羧酸混合物和12-40的二羧酸混合物组成的单体混合物的固体混合物 重量%的间苯二甲酸,其中高达20重量%的二羧酸混合物也可以被其它二羧酸代替,并且50摩尔%的六亚甲基二胺可以被其他C2-30重量代替 - 二胺在旋转双螺杆挤出机中停留时间为10秒至30分钟,加热至150-400℃的温度,同时除去蒸汽,如果合适的话,将其加热至通过排气孔。