Low-alkali or alkali-free active bright-blue dye and preparation method thereof
A technology of reactive brilliant blue and dyes, which is applied in the direction of reactive dyes, azo dyes, organic dyes, etc., can solve the problems of high energy consumption, labor consumption, and waste water, and achieve the reduction of waste water discharge, energy saving, and good dryness. The effect of wet fastness
Inactive Publication Date: 2015-02-25
ZHEJIANG YIDE CHEM
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The invention relates to the field of active dye in the novel technology and especially relates to low-alkali or alkali-free active bright-blue dye and a preparation method thereof. The invention provides the low-alkali or alkali-free active bright-blue dye shown in the formula (1), and in the formula (1), M represents hydrogen or alkali metal. In dyeing, the low-alkali or alkali-free active bright-blue dye can be crosslinked and fixed to cotton fibers only by use of 1-3g/l of an alkali agent and even, the low-alkali or alkali-free active bright-blue dye can be crosslinked and fixed to the cotton fibers under the condition of dyeing bath pH of 7 and no alkali agent. The preparation method is a novel technology completely different from the traditional technology and is especially suitable for blended fabric dyeing. The low-alkali or alkali-free active bright-blue dye and the cotton fibers are bonded by covalent bonds and thus dry and wet fastness, solarization fastness and washing fastness are stable and good. Separated picolinic acid is a vitamin and has small influence on the environment.
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