Azo dye composition and application thereof

Abstract

The invention relates to an azo dye compound and the application thereof. The compound is the combination of at least two dyes with A in the general formula (I) selected from any structure of (a), (b) or (c); any combination with A to be at least one from (a), at least one from (b) or at least one from (c); or the combination of at least one dye shown by the general formula (1) and at least one general disperse dye, or / and a dye as shown by the formula (2). Each substituent is shown as the claim of right. The compound can dye polyester and blended fabric thereof under the condition of strong alkalinity with pH more than or equal to 11 and less than or equal to 14; the alkalinity condition can effectively remove slurry and oil on the fabric, and overcomes the defect that decomposition products can be separated out in an acid bath, and cause dyeing defect. The cloth and the fabric adopting the azo dye compound are neat and have excellent styles. In addition, the polyester fiber and the blended fabric thereof can be pretreated with alkalinity and be dyed in a bath and at one step, thus improving the efficiency, and reducing the manufacturing cost and the waste water from dyeing.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and relates to an azo dye composition and an environment-friendly, energy-saving and high-efficiency dyeing method applied to polyester fibers. Background technique [0002] The staining of various oil agents in the spinning process of polyester and other chemical fiber fabrics is a problem that must be solved in the pre-dyeing process. Alkaline conditions are basically used for the removal of oil agents. But this technological condition causes unnecessary trouble to dyeing process. As we all know, conventional disperse dyes must be dyed under acidic conditions. After alkaline degreasing, they must be drained and washed, and then dyed with acetic acid to adjust the pH value. How to shorten the dyeing process and achieve one-bath degreasing dyeing is a difficult problem for polyester dyeing. In the past ten years, the problems of energy shortage and environmental pollution h...

AI Technical Summary

Problems solved by technology

[0010] In summary, although some commercially available disperse dyes can be dyed under weakly alkaline conditions, they are not resistant to alkaline baths with high concentrations of alkaline agents and high pH dyeing baths, and the compatibility between single dyes is poor, so they cannot better meet the requirements of the previous requirements. To deal with the needs of scouring and one-bath one-step dyeing, and some alkali-resistant disperse dyes hardly color the dyed fabrics during dyeing, and the dyes decompose seriously during the dyeing process

In the prior art, the research on alkaline dyeing is basically limited to the auxiliary agent and the dyestuff as the auxiliary, which fails to solve the problem of polyester fiber dyeing process fundamentally.

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