Azodyes containing a bridge member based on diamino-substituted triazines

An anionic acid dye of the formula ##STR186## in which R.sub.1 and R.sub.2 independently of one another are hydrogen or C.sub.1 -C.sub.4 alkyl,

• B.sub.1 is an aliphatic or aromatic bridge member,
• A.sub.1 and A.sub.2 independently of one another are the radical of a monoazo- or disazo dye or the radical of a metal complex azo dye,
• n is the number 0 or 1 and
• Y.sub.1 and Y.sub.2 independently of one another are a radical of the formula ##STR187## in which R.sub.7, R.sub.8 and R.sub.8 ' independently of one another are hydrogen or C.sub.1 -C.sub.8 alkyl which is unsubstituted or substituted by hydroxyl, C.sub.1 -C.sub.4 alkoxy, halogen, amino or sulfato, and
• E.sub.1 is C.sub.2 -C.sub.8 alkylene which is unsubstituted or substituted by hydroxyl, C.sub.1 -C.sub.4 alkoxy, halogen, amino or sulfato and is uninterrupted or interrupted by one or more groups -O-, or C.sub.5 -C.sub.7 cycloalkylene, C.sub.5 -C.sub.7 cycloalkylene-C.sub.1 -C.sub.8 alkylene or C.sub.1 -C.sub.8 alkylene-C.sub.5 -C.sub.7 cycloalkylene, each of which is unsubstituted or substituted in the alkylene radical by hydroxyl or C.sub.1 -C.sub.4 alkoxy and in the cycloalkyl ring by C.sub.1 -C.sub.4 alkyl, and in which dye of formula (1) the number of sulfo groups is greater than the number of cationic groups and basic groups.