聚阳离子固色剂的合成及固色机理

Synthesis and color fixation mechanism of polycationic fixing agent

选用单体二甲基二烯丙基氯化铵和二烯丙基胺为原料,以环氧氯丙烷(ECH)为交联剂,偶氮二异丁腈(AIBN)为引发剂,合成一种聚阳离子固色剂。考察反应温度、原料配比、引发剂用量、冰醋酸用量、交联剂用量对耐汗渍色牢度的影响。结果表明:当反应温度为75℃、二甲基二烯丙基氯化铵与二烯丙基胺质量比为100∶7、引发剂用量为0.10 g、冰醋酸用量为1.7 g、交联剂用量为1.55 g时,固色效果最佳。聚阳离子固色剂的固色机理是聚阳离子化合物与阴离子染料分子反应产生色淀,同时在织物表面形成致密的高分子膜。产品用于超细纤维PU革的耐汗渍处理,效果满意。

A modified polycationic fixing agent for superfine fiber PU leather was synthesized by using dimethyl diallyl ammonium chloride and diallylamine as raw materials, epichlorohydrin(ECH) as crosslinking agent and azodiisobutyronitrile(AIBN) as initiator. The effects of reaction temperature, material ratio, initiator dosage, glacial acetic acid dosage and crosslinking agent dosage on color fastness to sweat were investigated. The results showed that when the reaction temperature was 75 ℃, the mass ratio of raw material dimethyl diallyl ammonium chloride and diallylamine was 100∶7, the initiator was 0.10 g, glacial acetic acid was 1.7 g and the dosage of crosslinking agent was 1.55 g, the color fixation effect was the best. At the same time, it was found that the color fixing mechanism of polycationic color fixing agent was the result of the joint action of the two effects of the reaction of polycationic compounds with anion dye molecules to produce color deposition and the formation of dense polymer film on the fabric surface. The product is used for sweat resistant fixation of microfiber PU leather, and the effect of fixation treatment is satisfactory.