Process for producing moldings with an increase in the melt stiffness
    42.
    发明授权
    Process for producing moldings with an increase in the melt stiffness 有权
    具有增加熔体刚度的生产模制品的方法

    公开(公告)号:US08647551B2

    公开(公告)日:2014-02-11

    申请号:US11354114

    申请日:2006-02-15

    摘要: A process for producing moldings with condensing-up of a polyamide molding composition whose polyamide component contains, as a result of the method of preparation, at least 5 ppm of phosphorus in the form of an acidic compound by means of a compound having at least two carbonate units, wherein a) from 0.001 to 10% by weight, based on the polyamide, of a salt of a weak acid is added to the polyamide molding composition prior to compounding or during compounding, b) a mixture of the finished composition and the compound having at least two carbonate units is prepared, c) the mixture is, if appropriate, stored and/or transported and d) the mixture is subsequently processed to produce the molding, with the condensing-up occurring only in this step, effects a significant increase in the melt stiffness combined with moderate processing pressures, which considerably simplifies, in particular, the production of hollow bodies and hollow profiles having large diameters.

    摘要翻译: 一种聚酰胺成型组合物的制造用模制品的制造方法,其聚酰胺成分作为制备方法的结果,含有至少5ppm的酸性化合物形式的磷,该化合物具有至少两个 碳酸酯单元,其中a)基于聚酰胺的0.001至10重量%的弱酸盐在配混之前或在配混期间加入到聚酰胺模塑组合物中,b)成品组合物和 制备具有至少两个碳酸酯单元的化合物,c)如果合适的话,该混合物被储存和/或运输,以及d)随后将该混合物加工以产生模制物,其中仅在该步骤中发生冷凝, 结合中等加工压力的熔体刚度的显着增加,这特别地简化了具有大直径的中空体和中空型材的生产。