Patent ID: 7132516

Claim:
A mono- or bisazo 1:1 copper complex dye compound comprising the residue of a mono- or bisazo dye compound according to general formula (I) wherein n is 0 or 1, D is the residue of a diazo component D′ substituted by at least one N—C 1-6 alkyl-, N—C 6-10 aryl or N—C 1-6 alkoxyalkyl-sulfamyl group, with the diazo component D′ selected from the group consisting of substituted or unsubstituted phenol and substituted or unsubstituted naphtol, K 0 and K 1 are the residues of coupling components K 0 ′ and K 1 ′ substituted by at least one N—C 1-6 alkyl-, N—C 6-10 aryl or N—C 1-6 alkoxyalkyl-ammonium sulfonate or carboxylate group, with the coupling component K 0 ′ selected from the group consisting of substituted or unsubstituted phenol, substituted or unsubstituted naphtol, substituted or unsubstituted 1-phenyl-5-pyrazolone, and substituted or unsubstituted 1-naphtyl-5-pyrazolone and the coupling component K 1 ′ selected from the group consisting of substituted or unsubstituted phenol, and substituted or unsubstituted naphtol with the further substituents of the phenol, naphtol, 1-phenyl-5-pyrazolone and 1-napthyl-5-pyrazolone being hydroxy, methyl, methoxy or halogen.