Fibre-reactive azo dyes, their preparation and their use

Abstract

Reactive dyes of formula (1) wherein R1, R2, R3 and R4 are each independently of the others hydrogen or unsubstituted or substituted C1-C4alkyl, (R5)s denotes s identical or different substituents selected from the group halogen, sulfo, carboxy, C1-C4alkyl and C1-C4alkoxy, B is an aliphatic bridging member, X1 and X2 are halogen, r is an integer from 0 to 2, s is an integer from 0 to 3, and n and m are each independently of the other a number 1 or 2, and Z is a fibre-reactive group of formula —SO2—Y (2a), —NH—CO—(CH2)K—SO2—Y (2b), —CONH—(CH2)I—SO2—Y (2c), —NH—CO—CH(Hal)-CH2-Hal (2d) or —NH—CO—C(Hal)=CH2 (2e) wherein Hal is chlorine or bromine, k and I 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 are suitable for dyeing cellulosic or amide-group-containing fibre materials.

Dependencies are inferred from the claim text.