Amino benzophenone dye

A benzophenoneazo dye of the formula I ##STR249## wherein ring A has benzo group fused thereto and optionally has a --C.sub.2 H.sub.4 -- group linking ring A to the fused benzo group,

• m is 1 or 2,
• K is a 6-hydroxypyrid-2-one radical which in ring position 3 is unsubstituted or substituted by carbamoyl, C.sub.2 -C.sub.5 -alkanoyl, hydroxysulfonylmethyl or hydroxysulfonyl, the radical of a phenylazopyridone, imidazolopyridine, aminopyrazole, hydroxypyrazole, aminothiazole, pyrimidine, quinolone or aniline coupling component, or the radical of a coupling component of the formula IIm ##STR250## where Z.sup.19 is amino, phenylamino, C.sub.1 -C.sub.4 -alkanoylamino or benzoylamino,
• Z.sup.20 is hydrogen or hydroxyl, and
• r is 1;
• Y, when m is 1, is hydrogen, the radical ##STR251## U.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl or hydroxysulfonyl and U.sup.2 is hydrogen, unsubstituted or sulfato-substituted C.sub.1 -C.sub.4 -alkyl, hydroxysulfonyl, phenylsulfonyloxy or 6-methyl-7-hydroxysulfonylbenzothiazol-2-yl;
• or the radical --N.dbd.N--Q.sup.2, wherein Q.sup.2 is the radical of coupling component, or, Y, when m is 2, is hydrogen,
• one of the two radicals X.sup.1 and X.sup.2 is hydrogen and the other is hydroxysulfonyl;
• R.sup.1, R.sup.2 and R.sup.3 are identical or different and each is independently of the others hydrogen, halogen, C.sub.1 -C.sub.12 -alkyl, cyclohexyl, phenyl, 2-hydroxyethylsulfonyl or C.sub.1 -C.sub.4 -alkoxy or, when m is 1 and Y is hydrogen, one of R.sup.1, R.sup.2 or R.sup.3 is a radical of the formula:
• ##STR252## where L.sup.1 is a covalent bond, C.sub.1 -C.sub.4 -alkylene, oxygen or a radical of the formula O--CH.sub.2, O--CH.sub.2 CH.sub.2 --O, O--CH.sub.2 CH.sub.2 CH.sub.2 --O or O--CH(CH.sub.3)CH.sub.2 --O, and X.sup.1, X.sup.2, R.sup.4, K and the ring A are each as defined above, and
• R.sup.4 is hydrogen, halogen or C.sub.1 -C.sub.4 -alkoxy.