Fibre-reactive azo dyes, their preparation and their use.

Abstract

Reactive dye of the formula wherein B is an aliphatic bridging member, G is a sulfo naphthalene group or a sulfo benzene group of the formula a pyridone radical of the formula R1, R2, R3 and R4 are each independently of the others hydrogen or unsubstituted or substituted C1-C4alkyl, (R5)h denotes h identical or different substituents selected from the group sulfo, C1-C4alkyl and C1C4alkoxy, R6 is hydrogen, sulfo, halogen, carboxy, C1C4alkyl, C1-C4alkoxy or a fibre-reactive group Z1 of the formula -SO2-Y -NH-CO-(CH2)I-SO2-Y -CONH-(CH2)m-SO2-Y (3c), -NH-CO-CH(Hal)-CH2-Hal (3d) or NH-CO-C(Hal)=CH2 (3e), R7 is amino, C1-Caalkyl or a fibre-reactive group Z2 of the formula NH-(CH2)n-SO2-Y (3a), (R8)j denotes j identical or different substituents selected from the group sulfo, C2C4alkanoylamino, ureido, C1-C4alkyl and C1C4alkoxY, R9 is hydrogen, C1-C4alkyl or C1-C4alkoxY, R10 is hydrogen or C1-C4alkyl, R11 is hydrogen, cyano, carbamoyl or sulfomethyl, and R12 is hydrogen, C1-C4alkyl, or phenyl which is unsubstituted or substituted by C1-C4alkyl,C1C4alkoxy, C2-C4alkanoylamino, ureido, halogen or sulfo, X1 and X2 are halogen, Hal is chlorine or bromine, h and j are each independently of the other a number 0, 1 or 2, k is a number 1, 2 or 3, I, m and n are each independently of the other a number 2, 3 or 4, and Y is vinyl or a radical -CH2-CH2-U and U is a group removable under alkaline conditions, with the proviso that the dye of formula (1) contains at least one fibre-reactive group Z1 or Z2 are suitable for dyeing cellulosic or amide-group-containing fibre materials.