Water-soluble azo dyestuffs

Claim 1

A water-soluble dyestuff which in the form of the free acid has the formula (1) ##STR56## in which K 1 and K 2 are identical to or different from each other and K 1 is, in the form of the free acid, a radical of the formula ##STR57## in which R 5 , R 6 and R 7 are identical to or different from each other and R 5 is hydrogen, lower alkyl, lower alkoxy or sulfo, R 6 is hydrogen, lower alkyl or sulfo, R 7 is lower alkyl, carboxy or carbalkoxy with 1 to 4 C atoms in the alkyl moiety and B is a benzene nucleus or a naphthalene nucleus, and K 2 is, in the form of the free acid, a radical of the formula ##STR58## in which B, R 5 , R 6 and R 7 are as defined above and R is hydrogen or lower alkyl and p is 1 or 2, the radicals K 1 and K 2 being identical to or different from each other and each bonded via the amino groups to the s-triazine radicals and bonded to the azo groups in ortho-position to the hydroxy group, n is zero or 1, D is a benzene nucleus or naphthalene nucleus, R 1 is in ortho-position to the azo group and is hydrogen, halogen, lower alkyl, lower alkoxy, hydroxy, carboxy or sulfo, R 2 is hydrogen, halogen, lower alkyl, lower alkoxy, nitro or sulfo, R 1 and R 2 being identical to or different from one another, X is β-thiosulfatoethyl, β-chloroethyl, β-sulfatoethyl or vinyl, A is an aliphatic radical of 2-10 C atoms or an aliphatic radical of, in total, 2-6 C atoms which may be interrupted by a heteroatom and/or a cycloaliphatic radical, or is a cycloaliphatic radical or is a benzene nucleus or a naphthalene nucleus, the nuclei may be substituted by substituents selected from the group consisting of lower alkyl, lower alkoxy, chlorine, sulfo, carboxy and lower alkanoylamino, or A is ##STR59## wherein the nuclei may be substituted by substituents selected from the group consisting of lower alkyl, lower alkoxy, sulfo, carboxy and chlorine, D 1 is a direct covalent bond or a bridge member and E is --O--, --S--, --NH-- or --SO 2 --, and Y is chlorine, fluorine, bromine, sulfo or a group of the formula --S--R' or --O--R", in which R' is lower alkyl, substituted lower alkyl, phenyl, naphthyl, substituted phenyl, substituted naphthyl or 2-benzthiazolyl and R" is hydrogen or has the meaning of R' with the exception of 2-benzthiazolyl, or Y is an amino group of the formula --NR 3 R 4 , in which R 3 is hydrogen, an optionally substituted lower aliphatic radical, an optionally substituted araliphatic radical or a cycloaliphatic radical and R 4 is hydrogen, an optionally substituted lower aliphatic radical or an optionally substituted aromatic radical or an optionally substituted araliphatic radical or is a hydroxy group, a lower alkoxy, or an optionally substituted amino group, or R 3 and R 4 together with the nitrogen atom form a ring containing a lower alkylene and optionally a hetero-atom; or a copper, chromium or cobalt complex dyestuff of the above compounds of the formula (1) wherein one or both of the R 1 s are hydroxy.