Preparation And Application Of Chlorine-resistant Fixing-agent For Reactive Dyes

Reactive dyes are widely used in dyeing and printing and have taken the place of other kinds of dyes in more and more fields because they can be used easily and provide better color fastness, shinier color and wider color-range. However, reactive dyes generally have poor color fastness to chlorine, so it's hard for some color textile to satisfy color fastness to chlorine. To improve it, many developers try to invent chlorine-resistant dyes. But the invention needs large consumption of time and money, and it need a long period to get returned. Otherwise, if we turn to auxiliaries which are chlorine-resistant and have simpler structure than the dyes, a large amount of money and time will be saved.Chlorine-resistant dye-fixing agent CRS was prepared by mixing polyamine CS and polymer CR synthesized by dimethyldiallyl-ammonium chloride (DMDAAC) and allylamine(AA). Both synthesis of DMDAAC and AA and application of CRS were studied in this thesis. And influences of chlorine-resistant dye-fixing agent CRS to chlorine, washing, rubbing and light color fastness were studied together. Then, the influences of CRS to color differences and endurance of CRS to washing were also studied.The result shows that chlorine-resistant dye-fixing agent CRS can obviously improve reactive dyes' color fastness to chlorine by 1 level or so. It's better than the same kind of products in market. CRS can't obviously improve washing and rubbing color fastness and even will reduce light color fastness by half level or so. Textile finished by CRS will also cause color differences which are different for different dyes. So dyes have to be well chosen according to color requirement of textile. Endurance of CRS to washing is not good. After washing for 5 times, color fastness to chlorine will obviously decrease. This is a problem which is still need to be solved.