Mono- and bis-azo compounds containing 6-hydroxy-3-heterocyclic onium-pyridone-2-groupings coupled to diazo components containing diazine or triazine rings

A reactive dye of the formula I ##STR149## where n is 1 or 2,

• X is
• in case a), when n is 1, a radical of the formula IIa, IIB or IIc ##STR150## where R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl and Hal is fluorine or chlorine;
• or
• in case b), when n is 2, a radical of the above-mentioned formula IIa,
• L.sup.1 is:
• in case a), when n is 1 and X is a radical of the formula IIb or IIc, fluorine, chlorine, C.sub.1 -C.sub.4 -alkoxy or phenoxy;
• or
• in case b), when n is 1 and X is a radical of the formula IIa, C.sub.1 -C.sub.4 -alkyl, phenyl, or phenyl monosubstituted or disubstituted by hydroxysulfonyl, vinylsulfonyl or the radical
• --SO.sub.2 --C.sub.2 H.sub.4 --Z,
• where
• Z is a group which is detachable under alkaline reaction conditions;
• or
• in case c), when n is 2 and X is a radical of the formula IIa, is selected from the group consisting of phenylene, biphenylene, stilbenediyl and ureylenebisphenyl, each of which is substituted by one or two hydroxysulfonyl groups,
• D is the radical of an aniline or aminonaphthalene diazo component which has at least one hydroxysulfonyl group,
• L.sup.2 is hydrogen, C.sub.1 -C.sub.8 -alkyl, or C.sub.2 -C.sub.8 -alkyl which is substituted by hydroxyl and/or interrupted by one or two oxygen atoms which form an ether grouping;
• L.sup.3 is unsubstituted or substituted pyrrolium, pyrazolium, imidazolium, oxazolium, isoxazolium, thiazolium, isothiazolium, triazolium, oxadiazolium, thiadiazolium, pyridinium, pyridazinium, pyrimidinium or pyrazinium, wherein said substituents are selected from the group consisting of C.sub.1 -C.sub.18 -alkyl and carboxyl;
• and
• L.sup.4 is hydrogen or C.sub.1 -C.sub.4 -alkyl, with the proviso that the number of hydroxysulfonyl groups in the molecule exceeds that of the cationic groups by at least one.