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Cationic Dyes Effect Control

Cationic dyes pigment ions with a positive charge, generally with chloride ions and acetate, phosphate, methyl sulfate and other anionic salt, and some also add zinc chloride and other complex salt products, is an acidic group of acrylic Fiber-specific dyes. Cationic dyes and dyeing process Cationic dyes pigment ions with a positive charge, generally with chloride and acetate, phosphate, methyl sulfate and other anionic salt, and some also add zinc chloride and other complex salt products, is Acrylic fiber containing acrylic fiber dedicated dyes.Cationic Dyes

General alkaline dyes and cationic dyes are conjugated. Since the conjugated system in the dye is the chromogenic part of the dye and the cationic group is the sensitive position in the dye structure, the dye has poor light resistance and thermal stability, but its bright color is High color, uniform dyeing better. The cationic groups in the other cationic dye structures are separated from the chromophore system of the dye precursor, so they are called isolated cationic dyes.Cationic Dyes Because the cationic groups with high reactivity do not participate in the conjugation of the dye matrix, the chromophore system of the dye can be stable under the action of light and heat, so the dye is heat-resistant and the fastness is higher, Charge concentration, and fiber binding force is strong, it is not easy to get leveling effect. Cationic dyes are sensitive to the ph value of dye bath, which is stable in weak acid medium and has better solubility. However, if the ph value of the solution is too high, especially in alkaline conditions, the dye is prone to changes in color light, and even decomposition, precipitation; if ph value is too low, will cause dye color change or decomposition.Cationic Dyes

Cationic dye staining, ph value is generally controlled at 4 to 5. In addition, cationic dyes in the solution easily with the anionic additives and dyes to produce precipitation or produce coke material, so in principle should avoid the same bath with anionic compounds, but can also use this property, the choice of appropriate anionic additives To carry out slow dyeing or preparation of dispersed cationic dyes. Adding neutral electrolyte, but also on the cationic dye dyeing effect of slowing, get leveling effect.Cationic Dyes