Metal free acid dyes, methods for the production thereof and their use

摘要

The present invention relates to dyes of the formula (I) in which R1 to R10, D1 and D2 are defined as given in claim 1, a process for preparing them, and their use for dyeing and printing hydroxyl- and/or carboxamido-containing materials.;

主权项

1. A dye of the formula (1) in which each of R1, R2, R3 and R4, independently from one another is hydrogen or (C1-C6) alkyl; each of R5 and R6, independently from one another is hydrogen, (C1-C6) alkyl or (C1-C6) alkyl substituted by hydroxy; each of R7 and R8, independently from one another is hydrogen, (C1-C6) alkyl or phenyl; each of R9 and R10, independently from one another is hydrogen, (C1-C6) alkyl, (C1-C6) alkoxy, trifluoromethyl, hydroxy, cyano, nitro, halogen, —NHCHO, —NHCO(C1-C6)-alkyl, —NHCOaryl, —NHSO2(C1-C6)-alkyl or —NHSO2aryl; and each of D1 and D2, independently from one another is the residue of a diazo component, which comprises at least one group —SO3M, wherein M is hydrogen, an alkali metal, ammonium or one equivalent of an alkali earth metal.