Polyazo dyes having a diazo component of the aminobenzophenone series

A polyazo dye of the formula (Ia) ##STR251## where p is from 1 to 2, R.sup.5 and R.sup.6, identical or different, are hydroxyl or amino;

• R.sup.7 is hydrogen, C.sub.1-4 alkyl, halogen, nitro, hydroxysulfonyl, sulfamoyl, C.sub.1-4 -mono- or -dialkylsulfamoyl, phenylsulfamoyl or C.sub.1-4 -alkylsulfonyl;
• R.sup.8 hydrogen, halogen, nitro or hydroxysulfonyl;
• the ring B can be fused by an optionally nitro- or hydroxysulfonyl-substituted benzo ring, in free form or as a copper, chromium, iron, cobalt or nickel complex;
• and Z is a radical of the formula (IIb) ##STR252## where one of the radicals X.sup.1 and X.sup.2 is hydrogen and the other is hydroxysulfonyl;
• R.sup.1 and R.sup.2, the same or different, are chlorine or C.sub.1-4 -alkyl;
• and
• the carbonyl group of the radical (IIb) is para to X.sup.1 or to the azo group.

A polyazo dye of the formula (Ia) ##STR253## where p is from I to 2, R.sup.5 and R.sup.6, identical or different, are hydroxyl or amino;

• R.sup.7 is hydrogen, C.sub.1-4 alkyl, halogen, nitro, hydroxysulfonyl, sulfamoyl, C.sub.1-4 -mono- or -dialkylsulfamoyl, phenylsulfamoyl or C.sub.1-4 -alkylsulfonyl;
• R.sup.8 is hydrogen, halogen, nitro or hydroxysulfonyl;
• the ring B can be fused by an optionally nitro- or hydroxysulfonyl-substituted benzo ring, in free form or as copper, chromium, iron, cobalt or nickel complex;
• and Z is a radical of the formula (IIc) ##STR254## where one of the radicals X.sup.1 and X.sup.2 is hydrogen and the other is hydroxysulfonyl;
• R.sup.1 and R.sup.2, the same or different, are chlorine or C.sub.1-4 -alkyl;
• and
• the carbonyl group of the radical (IIc) is para to X.sup.1 or to the azo group.