【摘 要】
：
水性聚氨酯皮革涂饰剂是一种高档皮革涂饰材料,由于其优越的综合性能和良好的环保效应,已在国内外的皮革涂饰中得到了广泛的应用.目前中国绝大部分水性聚氨酯属于聚醚型,主其
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水性聚氨酯皮革涂饰剂是一种高档皮革涂饰材料,由于其优越的综合性能和良好的环保效应,已在国内外的皮革涂饰中得到了广泛的应用.目前中国绝大部分水性聚氨酯属于聚醚型,主其要缺陷为:涂膜干燥慢,耐湿擦牢度差,易加粘,膜的机械性能国外同类产品相比还有差距.该文采用聚酯二醇作为软段,与甲苯二异氰酸酯合成了阴离子型水性聚氨酯分散体,产品的机械性能完全达到了皮革涂饰的使用要求,成膜较快.研究了预聚物的合成工艺,考察了NCO/OH比值、羧基含量、原材料含水量、聚酯分子量、扩链剂、呼和剂种类和中和率等对外产品外观和性能的影响;系统分析和研究了预聚反应过程中各个阶段反应温度的影响,得到了各个阶段适宜的工艺和配方.
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