Reactive dyes, their preparation and their use

Abstract

Reactive dyes of formula (1), wherein R1 is hydrogen or unsubstituted or substituted C1-C4alkyl, (R2)s denotes s identical or different substituents from the group halogen, nitro, unsubstituted or halo-substituted C1-C4alkyl, C2-C4alkanoylamino, C1-C4alkylsulfonyl, carbamoyl, sulfamoyl and sulfo, Me is chromium, cobalt or iron, E is a bivalent radical of formulae (1a), (1b) or (1c), wherein X denotes chlorine or fluorine, T is a fibre-reactive radical of formula (2a): -NH-(CH2)2-3-SO2-Z, formula (2b): -NH-(CH2)2-3-O-(CH2)2-3-SO2-Z, formulae (2c), (2d), (2e) or (2f), (R3)0-2 denotes from 0 to 2 identical or different substituents from the group halogen, C1-C4alkyl, C1-C4alkoxy and sulfo, Z is vinyl or a -CH2-CH2-U radical and U is a group that is removable under alkaline conditions, Q is a -CH(HaI)-CH2-HaI or -C(HaI)=CH2 group, s is the number 0, 1, 2 or 3, q is the number 0 or 1, A denotes a bivalent radical of formulae (3a), (3b), (3c) or (3d), wherein R1, R2, X, T, m, n, q and s are as defined above, R4 and R7 denote hydrogen or C1-C4alkyl, R5 and R6 represent, each independently of the other, identical or different substituents from the group hydroxyl, halogen, nitro, unsubstituted or halo-substituted C1-C4alkyl, C1-C4alkoxy, C2-C4alkanoylamino, C1-C4alkylsulfonyl, carbamoyl, sulfamoyl and sulfo, and t and u are each independently of the other the number 0, 1, 2 or 3, are especially suitable for dyeing synthetic polyamide fibre materials and yield dyeings or prints having good wet-fastness properties.

Description

technical field [0001] The present invention relates to novel reactive dyes, to a process for their preparation and to their use in the dyeing or printing of textile fiber materials. Background technique [0002] The recent use of reactive dyes for dyeing has led to higher demands on the quality of the dyeings and the economic efficiency of the dyeing process. Therefore, there is still a need for new reactive dyes with improved properties, especially with regard to their applications. [0003] Dyeing currently requires reactive dyes that are sufficiently substantive and at the same time have good properties for easy washing of unfixed dye. They should also have good color yields and high activity, the purpose of which is in particular to provide dyeings with a high level of fixity. Known dyes do not satisfy those requirements in all properties. [0004] To date, highly pigmented dyeings on polyamides have only been possible by using acid dyes, but the dyeings are not fast...

AI Technical Summary

Problems solved by technology

Known dyes do not meet those needs in all properties

[0004] So far, highly pigmented dyeings on polyamides have only been possible with acid dyes, but the dyeings are not fast when wet at elevated temperatures

Images