The invention relates to a coloured polymer composition with strongly improved colour properties. This improvement is achieved by masking groups in the polymer that are reactive with respect to the colorant with the aid of an effective quantity of a compound suitable for this purpose.
The invention is particularly suitable for polyamides, the amino end group content being reduced to less than 20, preferably less than 5 meq/kg, with the aid of acetyl lactam. The thermostability of e.g. CI Pigment Red 209 coloured nylon-6 is improved by a factor of 9. The brightness of the colour also increases to a surprising extent.
本发明涉及一种着色聚合物组合物,其着色性能得到极大改善。这种改善是通过掩蔽聚合物中与
着色剂有关的反应基团,并借助适于此目的的有效化合物来实现的。
本发明尤其适用于聚酰胺,在乙酰内酰胺的帮助下,
氨基末端的含量可降低到 20 meq/kg 以下,最好是 5 meq/kg 以下。例如,CI Pigment Red 209 着色尼龙-6 的热稳定性提高了 9 倍,颜色亮度也有惊人的提高。