Reactive dyes, process for their preparation and their use

Abstract

Reactive dyes of formula (1) wherein A is phenyl or naphthyl, each of which is unsubstituted or substituted by halogen, C1-C4alkyl, C1-C4alkoxy, carboxy, sulfo or a fiber-reactive group of formula (2a), (2b), (2c), (2d) or (2e) —SO2—Y  (2a), —NH—CO—(CH2)l—SO2—Y  (2b), —CONH—(CH2)m—SO2—Y  (2c), —NH—CO—CH(Hal)—CH2Hal  (2d) or —NH—CO—C(Hal)═CH2  (2e), B is an aliphatic linking group, D is the radical of a diazo component of the benzene or naphthalene series, R1 is hydrogen or unsubstituted or substituted C1-C4alkyl, R2 is hydrogen, cyano, carbamoyl or sulfomethyl, R3 is hydrogen or C1-C4alkyl, R is hydrogen or unsubstituted or substituted C1-C4alkyl or corresponds to a radical of formula (3) wherein B, D, R2 and R3 have the meanings cited above, X1 is halogen, hydroxy, C1-C4alkoxy, unsubstituted or substituted C1-C4alkylthio or amino, or a N-heterocycle which may contain additional heteroatoms, Hal is chloro or bromo, Y is vinyl or a —CH2—CH2—U radical, U is a group a which is removable with alkali, and l and m are each independently of the other the number 2, 3 or 4, with the proviso that A and D are not simultaneously a phenyl radical which is substituted by the radical of formula (2a) if R is β-hydroxyethyl or β-sulfatoethyl and R1 is C1-C4alkyl, are particularly suitable for dyeing cotton and give dyeings having very good allround fastness properties.

Dependencies are inferred from the claim text.