Yellow dye mixtures comprising water-soluble fiber-reactive azo dyes and use thereof

A dye mixture comprising

• i.) one or more dyes of the general formula (1a) or (1b) or of a combination of the dyes of the formulae (1a) and (1b) and
• ii.) one or more dyes of the general formula (2a) or (2b) or (2c) or of a combination of the dyes of the formulae (2a) to (2c) in a molar ratio of the dyes i) to ii) of 70:30 to 30:70.
• wherein:
• M is hydrogen or an alkali metal;
• D is the radical of benzene or of naphthalene;
• Y1 is vinyl or is ethyl which is substituted in the β-position by an alkali-eliminable substituent;
• R is amino or alkyl of 1 to 4 carbon atoms or is alkyl of 1 to 4 carbon atoms which is substituted by carboxyl, sulfo, phosphato hydroxyl or a —SO—Y2 group where Y2 has one of the meanings of Y1;
• R1 is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms or sulfo;
• m is 1, 2 or 3;
• Z is a fiber-reactive radical selected from the group of the halopyrimidines, of the dichloroquinoxalines or of the halotriazines which are optionally substituted by an ether or amino grouping, where the radical of the halotriazine can also be bonded to a group of the general formula —SO2—Y3, where Y3 has one of the meanings of Y1 and this group is attached via a bridge member to an amino group attached to the triazine radical;
• Z0 is a bivalent radical of the general formula (3)
• where
• Hal is fluorine, and
• W is phenylene, alkylene, phenylene-alkylene-phenylene, phenylene-alkenylene-phenylene or phenylene-phenylene or a radical of the general formula phen-G-phen, where the phenylene radicals may be substituted by 1 or 2 substituents selected from the group consisting of methoxy, ethoxy, methyl, ethyl, sulfo and carboxyl, the alkylene radicals contain 1 to 6 carbon atoms, and may be substituted by sulfo or carboxyl and/or interrupted by 1 or 2 hetero groups, and the alkenylene radicals are those of 2 to 4 carbon atoms, and where phen is equal to phenylene of the above definition and G is —O—, —NH—, —CO— or —NH—CO—NH—;
• R2 is methyl or carboxyl;
• R3 is hydrogen, halogen, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms;
• p is zero, 1 or 2 and
• q is zero, 1 or 2, where the sum of (p+q) is 1, 2 or 3 and the —SO3M group is hydrogen when p is zero or q is zero;
• in the formula (2a) the —NH—Z group is attached to the benzene nucleus A or to the benzene nucleus B;
• in the formula (2b) one amino group of the bridge member —NH—Z0—NH— is attached to the benzene nucleus A of one monoazo radical and the other amino group is attached to the benzene nucleus B of the other monoazo radical or both the NH groups are attached to both As or to both Bs;
• R4 is hydrogen, sulfo, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms;
• R5 is methyl or carboxyl;
• R6 is hydrogen, sulfo, carboxyl, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms;
• R7 is hydrogen, sulfo, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms;
• n is 1 or2;
• B0 is hydrogen when n is 1, or is a direct covalent bond, alkylene, alkenylene or alkylene-phenylene-alkylene when n is 2, in which the phenylene radicals may be substituted by 1 or 2 substituents selected from the group consisting of methoxy, ethoxy, methyl, ethyl, sulfo and carboxyl, the alkylene radicals contain 1 to 6 carbon atoms and may be substituted by sulfo or carboxyl and/or interrupted by 1 or 2 hetero groups and the alkenylene radicals are those of 2 to 4 carbon atoms, or is a group of the hereinabove defined formula element Z0.