A kind of high-fixation disperse black dye composition and its preparation method and use method

Abstract

The invention belongs to the field of printing and dyeing, and specifically discloses a high-fixation disperse black dye composition, a preparation method and a use method. Specifically, through sand milling and ball milling, the sulfonated styrene-maleic anhydride grafted dispersant is used to treat the modified disperse dyes, so that the link between the disperse dyes and the synthetic fibers is better, and the gray cloth is easier to absorb and color, which is conducive to improving color fixation The rate can greatly reduce the dye loss in printing and dyeing wastewater. At the same time, using the heat-curing properties of thermosetting resins, the thermosetting resins are evenly dispersed and coated during the grinding of disperse dyes, and the composite dye particles are used to heat-cure the dyes after dyeing the cloth, so that the dyes are firmly connected to the fibers and the color fastness is improved. . The preparation method of the invention is simple, the process is simplified, the effect is obvious, and the existing mature equipment is used for preparation. The dyed gray cloth obtained by the method can improve the adhesion strength of dyestuffs to the fibers of textile fabrics, and the coloring rate can be improved.

Description

technical field [0001] The invention belongs to the field of printing and dyeing, in particular to printing and dyeing dyes, in particular to a high-fixation disperse black dye composition, a preparation method and a use method. Background technique [0002] Black dyes play an important role in the textile field, especially with the rapid development of various synthetic fibers, black dyes are widely used in imitation cotton and imitation leather. Since the disperse black dye is obtained by compounding dyes of various colors, black dyes with different textures can be obtained, and the purity and blackness are greatly improved, which opens up a broad prospect for the application of the disperse black dye. [0003] Disperse dyes are a class of dyes with relatively small molecules and no water-soluble groups in their structure. It must be dyed with the help of a dispersant, by dispersing the dye in the form of a suspension to dye in the form of microparticles. The main applic...

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Problems solved by technology

However, commonly used carriers such as o-phenylphenol, biphenyl, and methyl salicylate are toxic and harmful to humans.

The high-temperature and high-pressure dyeing method uses pressure and a high temperature of 120-130°C to make the chain segments of the fiber molecules move violently, and the instantaneous pores generated allow the dye molecules to diffuse into the interior of the fiber. , the improvement of color fastness is limited

[0006] At present, a typical disperse black dye on the market is composed of disperse orange 288, disperse orange 61, disperse dark blue 291, etc., dispersed through dispersants. Although it is stable and easy to dye, its fastness is poor. It is also difficult to diffuse and penetrate into the interior of textile fibers, and more is adsorbed on the surface of textiles

The reason is that although high temperature and high pressure make the molecular chain of the fiber move, the dyes that enter the fiber are limited after all, and the high temperature and high pressure printing and dyeing treatment time should not be too long, and the fiber will be damaged if the treatment is too long.

[0007] To sum up, in order to increase the color fixation rate and dyeing fastness of disperse black dyes, it is difficult to effectively solve the problem by relying on the dyeing process

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