湿摩擦牢度提高剂的合成与应用

为提高活性染料染棉织物的湿摩擦牢度,通过溶液自由基共聚法合成了水溶性聚氨酯丙烯酸酯共聚乳液,讨论了—COOH含量对乳液粒径、黏度、外观的影响,分析了甲基丙烯酸酯用量对乳液粒径的影响,并研究了初聚nNCO/nOH值对膜力学性能的影响,应用衰减全反射对产物结构进行了表征,并应用于棉织物的摩擦牢度提高整理。实验结果表明:当初聚nNCO/nOH值为2时,水性聚氨酯丙烯酸酯共聚乳液制成的薄膜具有良好的拉伸强度和断裂伸长率;—COOH含量为1.4%时,共聚乳液具有良好的分散稳定性;棉织物经共聚物整理后,织物的湿摩擦牢度、皂洗牢度都得到了提高。

Synthesis of wet rubbing fastness improver and its application on cotton fabrics dyed with reactive dyes

A water soluble polyurethane-acrylate (PUA) hybrid emulsion were synthesized through macromonomer radical copolymerization to improve wet rubbing fastness of cotton fabrics dyed with reactive dyes. The effects of -COOH content on the particle size, viscosity, and appearance of the emulsion were discussed. The effect of the dosage of acrylate on the particle size of the emulsion was analyzed, the relasionship between the ratio of nNCO/nOH and mechanical behavior of emulsion film was investigated. ATR was used to characterize the structure of the product, and PUA was applied on the cotton fabrics dyed with reactive dye for improving their rubbing fastness. The results showed that the PUA emulsion film had good tensile strength and breaking elongation when the ratio of nNCO/nOH was 1.4%; The emulsion had well dispersibility when COOH was 1.4%. The cotton fabrics treated with the PUA emulsion exhibited better wet rubbing fastness and soaping fastness.