Asymmetrical reactive dyes containing two triazinyl radicals which are bridged via an aliphatic bridge member

A reactive dye of the formula ##STR34## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are hydrogen or substituted or unsubstitued C.sub.1 -C.sub.4 alkyl,

• B is an aliphatic bridge member,
• Y.sub.1 and Y.sub.2 independently of one another are halogen or carboxypyridinium,
• A.sub.1 is the radical of a phthalocyanine, dioxazine, formazan or disazo dye, or a radical of the formula ##STR35## in which R.sub.10 is 0 to 3 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo, ##STR36## in which R.sub.10 is 0 to 3 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo, ##STR37## in which R.sub.12 is C.sub.1 -C.sub.4 alkanoyl, benzoyl or a halotriazinyl radical, which contains no further substituents or is further substituted, ##STR38## in which R.sub.12 is C.sub.1 -C.sub.4 alkanoyl, benzoyl or a halotriazinyl radical, which contains no further substituents or is further substituted, ##STR39## in which R.sub.13 is 0 to 3 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo, ##STR40## in which R.sub.17 is 0 to 2 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo;
• and
• Z' is .beta.-sulfatoethyl, .beta.-thiosulfatoethyl, .beta.-phosphatoethyl, .beta.-acyloxyethyl, .beta.-haloethyl or vinyl, or ##STR41## in which R.sub.18 is 0 to 2 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo;
• and
• Z' is .beta.-sulfatoethyl, .beta.-thiosulfatoethyl, .beta.-phosphatoethyl, .beta.-acyloxyethyl, .beta.-haloethyl or vinyl, and
• A.sub.2 is a radical of the formula ##STR42## in which R.sub.10 is 0 to 3 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo, ##STR43## in which R.sub.11 is 0 to 4 identical or different substituents selected from the group consisting of halogen, nitro, cyano, trifluoromethyl, sulfamoyl, carbamoyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, amino, acetylamino, ureido, hydroxyl, carboxyl, sulfomethyl and sulfo, ##STR44## in which R.sub.13 is 0 to 3 identical or different substituents selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, carboxyl and sulfo, or ##STR45## in which R.sub.14 and R.sub.16 independently of one another are hydrogen, C.sub.1 -C.sub.4 alkyl or phenyl, and R.sub.15 is hydrogen, cyano, carbamoyl or sulfomethyl.