Reactive Polyazo Dyes

A polyazo dye of the general formula I

• where
• Ar1 and Ar2 are independently substituted or unsubstituted aryl subject to the proviso that at least Ar1 or Ar2 bears a fiber-reactive group;
• T is a radical of the general formula II
• where B is a bridging element of the formula —NH—, —CO—, —SO2—, —CH═CH—, —CH2—CH2—, —NH—CO—, —NH—SO2—, —SO2—NH—SO2— or a direct bond;
• R6, R7, R8 and R9 are independently hydrogen, —SO3M, hydroxyl, amino, (C1-C12)-alkylamino with or without substitution in the alkyl group, di-(C1-C12)-alkylamino with or without substitution in the alkyl groups, substituted or unsubstituted (C1-C4)-alkyl, substituted or unsubstituted (C1-C4)-alkoxy, halogen or cyano;
• and
• s, t, u and v are independently 0, 1 or 2;
• or T is a radical of the general formula III
• where R6, R7, s and t are each as defined above;
• R1 and R2 are hydrogen, amino or hydroxyl subject to the proviso that the two radicals cannot both be amino or hydroxyl;
• M is hydrogen, an alkali metal or the equivalent of an alkaline earth metal;
• x is 0, 1 or 2;
• R3 and R4 independently have one of the meanings of R5 or are
• —COOM, —COOR10, —CONR11R12, —SO2NR13R14 or —CO—R15;
• and
• R5 is hydrogen, OR16 or —NR17R18, where
• R10, R11, R12, R13, R14, R15, R16, R17 and R18 are independently hydrogen, unsubstituted (C1-C4)-alkyl or (C1-C4)-alkyl substituted by hydroxyl, vinyl, phenyl, —CN or —COO(C1-C4)-alkyl;
• and
• r is 1 or 2,
• except polyazo dyes where r is 2, R5 and one of R3 and R4 are amino and the other of R3 and R4 is —COOM, —COOR10, —CONR11R12 or —CO—R15,
• and also their mixtures with each or one another.