The Types Of Dye-Fixing Agent
1. Reactive dye-fixing agent Reactive fixing agent is usually introduced reactive group in the fixing agent molecules,the commonly used reactive group here is the epoxy group. This dye-fixing agent will combine some groups in fiber dye molecules and form covalent bond, which is helpful to the fastness. The commonly used reactive dye-fixing agent is as follows: (1)The reactive cationic resin type fixing agent is usually produced by the reaction of diethylenetriamine , dicyandiamide and the epichlorohydrin (the introduction of epoxy group). It can not only improve the color fastness of direct dyes and acid dyes, but also does not change the color. (2)Polyether reactive fixing agent, is a kind of non-ionic polyether fixing agent produced by the reaction of polyether and epichlorrohydrin. This agent has a certain solubility in water. It can be cross-linked into macromolecular network structure in itself. Combining with dye, it will form large molecular compounds. the dye and fiber comb...