| abstract |
Tetrakisazo compounds of the formula <IMAGE> and salts thereof, wherein B is <IMAGE> wherein B1 is a bridging radical as defined in the specification, R7 is hydrogen or C1-4alkyl, R8 is hydrogen or C1-4alkyl, and each Y is independently halo, hydroxy, amino, hydroxyamino, C1-4alkoxy, phenoxy, substituted phenoxy, an aliphatic, cycloaliphatic or aromatic amine radical or a saturated heterocyclic amine radical, each D is independently mono-, di- or tri-sulfonaphthyl or <IMAGE> wherein R2 is hydrogen, halo, carboxy, C1-4alkyl, C1-4haloalkyl, C1-4alkoxy, -COOR4, (C1-4alkyl)carbonylamino or (C1-4alkoxy)carbonylamino, wherein R4 is C1-4alkyl, phenyl, benzyl or phenyl or benzyl substituted by 1 or 2 substituents selected from halo, C1-4alkyl and C1-4alkoxy, R3 is hydrogen, halo, hydroxy, C1-4alkyl or C1-4alkoxy, and m is 0, 1 or 2, each M is independently <IMAGE> wherein R5 is hydrogen, halo, C1-4alkyl, C1-4alkoxy or sulfo, R6 is hydrogen, C1-4alkyl, C1-4alkoxy, ureido or (C1-4alkyl)-carbonylamino, and p is 0 or 1, and each R1 is independently hydrogen or C1-4alkyl, with the provisos that (i) each -NR4- radical is in the 6- or 7-position of the naphthalene ring to which it is attached, and (ii) the compound contains at least 4 sulfo groups, which are useful for dyeing and printing hydroxy group-containing and or nitrogen-containing organic substrates, especially textiles containing cellulose fibers, paper and leather. The fastness properties of the obtained dyeings may be improved by after-treating the dyed substrate with a special fixing agent. |