Dye mixtures of fibre-reactive azo dyes and use thereof for dyeing material containing hydroxy-and/or carboxamido groups

Mixture of fibre reactive dyes comprising one or more dyestuffs of the formula (I)

• and one or more dyestuffs of the general formula (II)
• where
• X1, X2 are independently a labile atom or group;
• Ar1 is an aromatic residue substituted by at least one —SO3M group;
• M is hydrogen or alkali metal;
• Ar2 is an aromatic radical substituted with at least one —SO3M group;
• a is 1 or 2
• wherein,
• if a is 2
• L is a divalent radical typically of the form (y)
• where
• R1 and R2 are independently hydrogen, C1-C4 alkyl optionally substituted by —OR, —SR, —SO3M or X, or
• a phenyl group optionally substituted by a sulfonic acid group, —OR, —C1-C4-alkyl, or NR′ COR and
• L1 is arylene or alkylene optionally substituted by a sulfonic acid group, —OR, —C1-C4-alkyl —COOR,
• wherein R and R′ are independently hydrogen or C1-C4 alkyl and X is halogen or
• L is aminoethylpiperazine, under the proviso that if L is aminopiperazine, Ar1 and Ar2 are different or
• if a is 1
• L is a monovalent radical —NR3R4, —SR3 or —OR3
• where
• R3 and R4 have one of the meanings of R1 and R2 or for
• —NR3R4, R3 and R4 can form a cyclic structure of the form (o)
• where
• U is an C4- C6 alkyl residue optionally substituted by a substituent of formula Z and optionally interrupted by heteroatoms or heteroatom-containing groups,
• n is 1, 2 or 3 and
• Z is hydrogen, optionally substituted C1-C4 alkyl, —OR5, —CO2R5, —COR5 and
• R5 is hydrogen, optionally substituted C1-C4 alkyl, optionally substituted vinyl, optionally substituted phenyl.