Acid dyes free of metals, process for their production and use

摘要

Dye of formula (1) ** Formula ** where, independently of each other, G is a remainder of formula (i) or (ii) ** Formula ** R1, R2, R3 and R4 are hydrogen, (C1- C12) -alkyl, (C2-C6) -alkenyl, (C3-C6) -cycloalkyl or aryl- (C1-C12) -alkyl, the chain being straight or branched alkyl, and being optionally interrupted by one or more heteroatoms and / or substituted with one or more substituents selected from the group consisting of hydroxy, carboxy, SO3M, halogen, cyano, nitro, acyl, trifluoromethyl, acyloxy, aryloyloxy and carbamoyl, R5 and R6 are hydrogen, (C1-C12) -alkyl, (C1 -C12) -alkyl substituted, the substituents being selected from the group consisting of hydroxy, carboxy, SO3M, halogen, cyano, nitro, acyl, trifluoromethyl, acyloxy, aryloxy and carbamoyl, (C3-C6) -cycloalkyl, a group of formula (iii ) ** Formula ** wherein R26 and R27 are hydrogen, (C1-C12) -alkyl, (C1-C12) -alkyl substituted with hydroxy, (C1-C12) -alkoxy, trifluoromethyl, cyano, nitro, halogen, -NHCO (C1-C6) -alkyl or -NHSO2 (C1-C6) -alkyl, CONH2 or SO2NH2, R41 is hydrogen or (C1-C6) -alkyl, n is 0, 1 or 2, p is 0 or 1 a 6, or (C1-C12) -alkyl, wherein the alkyl chain may be interrupted by one or more heteroatoms, R7 and R8 are hydrogen, (C1-C6) -alkyl or phenyl, R9 and R10 are hydrogen, (C1- C6) -alkyl, (C1-C6) -alkoxy, trifluoromethyl, hydroxy, cyano, nitro, halogen, - NHCHO, -NHCO (C1-C6) -alkyl, -NHCOaryl, -NHSO2 (C1-C6) -alkyl, or -NHSO2aryl, D1 and D2 are a residue of a phenyl, naphthyl or heterocyclic derivative, comprising at least one SO3M group, wherein M is hydrogen, an alkali metal, ammonium, or tetra (C1-C12) -alkyl ammonium or unsubstituted