Black dye mixtures of fiber-reactive azo dyes and their use for dyeing hydroxy- and / or carboxamido-containing fiber materials

摘要

The present invention relates to a mixture of at least one disazo dye of the following general formula (1) and at least one monoazo dye of the following general formula (2).;Wherein R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ are the same as or different from each other, and are each hydrogen, methyl, ethyl, methoxy, ethoxy, sulfo or carboxy, and Y is each independently vinyl , β-chloroethyl, β-thiosulfatoethyl or β-sulfetoethyl, and M is hydrogen or an alkali metal.;This dye mixture contains 50 to 95 parts by weight of a disazo dye of formula (1) and 5 to 50% by weight of monoazo dye of formula (2).;Such dye mixtures may further contain dyes of yellow or red hue. They are useful for dyeing and printing fiber materials by known fiber-reactive dye techniques.