Dye mixtures, processes for their preparation and their use

A dye mixture which comprises a reactive dye of the formula ##STR86## together with at least one reactive dye of the formulae ##STR87## in which D and D' independently of one another are the radical of a diazo component of the benzene or naphthalene series or the radical of a mono- or disazo dye, R.sub.1 is C.sub.1 -C.sub.4 alkyl, R.sub.2 is cyano, carbamoyl or sulfomethyl, R.sub.3 and R.sub.3 ' independently of one another are hydrogen or C.sub.1 -C.sub.12 alkyl which is unsubstituted or substituted by hydroxyl, sulfo or sulfato and, with the exception of methyl, may be interrupted by oxygen and B is C.sub.2 -C.sub.12 alkylene which is substituted or unsubstituted and may be interrupted by oxygen, and the reactive dyes of the formulae (1a), (1b) and (1c) in each case contain at least one fibre-reactive radical bonded to the group D or, D', wherein said fibre-reactive radical is a group of the formula

• SO.sub.2 --Z (2a) ##STR88## in which W is a group of the formula --SO.sub.2 --NR.sub.4 --, --CONR.sub.4 or --NR.sub.4 CO--, R.sub.4 is hydrogen, C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by hydroxyl, sulfo, sulfato, carboxyl or cyano, or a radical of the formula ##STR89## R is hydrogen, hydroxyl, sulfo, sulfato, carboxyl, cyano, halogen, C.sub.1 -C.sub.4 alkoxycarbonyl, C.sub.1 -C.sub.4 alkanoyloxy, carbamoyl or the group --SO.sub.2 --Z, Z is a group of the formula --CH.dbd.CH.sub.2 or --CH.sub.2 --CH.sub.2 --U.sub.1 and U.sub.1 is a leaving group Z.sub.1 is a group of the formula ##STR90##
• Hal is halogen, E is the radical --O-- or --NR.sub.5 -- and R.sub.5 is hydrogen or C.sub.1 -C.sub.4 alkyl, alk and alk' independently of one another are C.sub.1 -C.sub.6 alkylene and arylene is a phenylene or naphthylene radical which is unsubstituted or substituted by sulfo, carboxyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen, or a fibre-reactive radical of the formula ##STR91## in which R' is hydrogen or C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by hydroxyl, sulfo, sulfato, carboxyl or cyano, X, X.sub.1 and X.sub.2 are halogen and T is halogen, hydroxyl, sulfo, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfonyl, phenylsulfonyl, morpholino or substituted or unsubstituted amino, or T is a fibre-reactive radical of the formula ##STR92## in which R, R.sub.4, E, W, Z, Z.sub.1, alk, alk' and arylene are as defined above, R.sub.6 is hydrogen or C.sub.1 -C.sub.4 alkyl and p is 0 or 1, and said dyes of the formulae (1a), (1b) and (1c) in each case contain at least one sulfo or sulfato group.