偶氮化合物，其包括（a）式的7-（vinylsulphonylphenylazo）-1-（2,4-二羟基-1,3,5-三嗪-6-基）氨基-6-磺基-8-萘酚（前体）的化合物（ （IA），和（b）7- vinylsulphonylphenylazo）-2（3） - （2,4-二羟基-1,3,5-三嗪-6-基） - 氨基-6-磺基-8-萘酚（前体） 式（IB）的化合物是新的。 在（IA）和（IB）中，M = H或碱金属; [R <5> = H，甲基，乙基，甲氧基，乙氧基或磺基; [R <6> = H，甲基，乙基，甲氧基或乙氧基; Y =乙烯基，β-氯乙基，β-或β-thiosulphatoethyl -sulphatoethyl; 和R = H或磺基，如果R = H时，三嗪基氨基是在2-或3-位，并且如果Y =磺基，它是在3位与6磺基-8-羟基萘-7- 基团。 （IA）具有间位或对位与三嗪基氨基一个-SO 3 M基。 所以要求保护的是（ⅰ）的染料混合物含有双偶氮染料（S）（II）和3 NOTLESS摩尔％单偶氮染料（S）（I）; 染料混合物（II）的制备; 和（iii）染色含羟基和/或羧酸酰胺基团与（IA）（IB）或纤维材料中，（I）（II）溶液中的混合物，并通过热和/或碱性试剂的固定的方法。

There are mixtures of fiber-reactive azo dyes described, with which black dyeings, including prints, on hydroxy- and / or carboxamido-containing fiber materials such as cellulose fiber materials, wool and synthetic polyamide fibers, can be obtained. These dye mixtures comprise one or more dyes of the following general formulas (1) and (2) and optionally one or more dyes of the general formulas (3), (4) and (5): in which M is hydrogen or an alkali metal, the substituents R ^1, R ³ and R ⁵ are each independently hydrogen, methyl, ethyl, methoxy, ethoxy or sulfo and R ^2, R ⁴ and R ⁶ to R ¹⁰ each independently represent hydrogen, methyl, ethyl, methoxy or ethoxy, Y each independently vinyl, β-chloroethyl, β-thiosulfatoethyl or β-sulfatoethyl, R is hydrogen or sulfo, X is chlorine or hydroxy, X ^o is chlorine, fluorine or hydroxy, Z is chlorine or hydroxyl, Z ¹ is alkanoyl of from 2 to 5 carbon atoms, benzoyl, 2,4-dichloro-1,3,5-triazin-6-yl or a group of the general formula X ¹ is chlorine, fluorine or cyanoamino and R ^o is sulfo, carboxyl or a group of the formula --SO ₂ --Y where Y has one of the abovementioned meaning and Z ^{2 is} chlorine, morpholino or a group of general formula with R ^o is as defined above.