一种活性染发剂的制备与应用

以酸性黄73、环氧氯丙烷、硫氢化钠为原料,采用两步法合成活性染料,考察了反应时间、反应温度、原料摩尔比对第1步反应产物收率的影响,得到的较佳反应条件为:n(环氧氯丙烷)∶n(酸性黄73)=20∶1,80℃下反应4 h,在此条件下第1步反应产物的收率为65%。再用硫氢化钠对第1步反应产物进行改性,得到巯基改性的酸性黄73。用红外光谱和液质联用对2步反应产物进行结构表征,并将巯基改性的酸性黄73用于染发剂中考察其染发效果。结果表明,目标产物可以与头发结合,且水洗牢度良好。

Preparation and application of a reactive hair dye

A reactive dye was synthesized from acid yellow 73,epichlorohydrin and sodium hydrosulfide via a two step process.The effect of reaction time,reaction temperature and mole ratio of reactants on yield of product of the first step was studied.Suitable reaction conditions were identified as:n(epichlorohydrin)∶n(acid yellow 73)=20∶1,reaction temperature 80 ℃,reaction time 4 h,yield 65%.Thio-modified acid yellow 73 was synthesized by treating the intermediate product prepared in the first step by sodium hydrosulfide.Chemical structure of the intermediate product and final product was characterized by IR and LC-MS.The thio-modified acid yellow 73 product was formulated in hair dye to investigate its dyeing efficacy.Results showed that the product can combine to hair with good fastness against water washing.