method to improve the performance and robustness of dyes dyeing fibrous material obtained from the cellulose with anionic dyes.compounds, cationic reagents towards the fiber and preparation thereof

摘要

A process for improving the color yield and the wetfastness properties of dyeings produced on cellulose fibre material with anionic dyes, which process comprises treating the cellulose material before, during or after dyeing, with a cationic fibre-reactive compound of the formula IMAGE (1) wherein B represents a mono- or polynuclear heterocyclic radical, Hal represents a reactive halogen atom, X represents halogen, lower alkoxy, lower alkylthio, phenoxy, phenylthio, -NH2, IMAGE or the group of the formula IMAGE (1a) IMAGE (1b), each of W1 and W2 independently represents the direct bond, IMAGE Z represents hydrogen, lower alkyl or hydroxy-lower alkyl, each of Q1 and Q2 independently represents an aliphatic or cycloaliphatic radical, each of R1, R2, V1, V2, Y1 and Y2 independently represents lower alkyl, or lower alkyl or benzyl each of which is substituted by halogen, hydroxy or cyano, or each of the pair of substituents R1 and R2 and Y1 and Y2 together with the nitrogen atom to which it is attached independently represents a 5- or 6-membered heterocyclic ring, or each of R1, R2 and V1 and Y1, Y2 and V2 together with the nitrogen atom to which it is attached independently represents a pyridine ring, or, if W1 and W2 are IMAGE each of Z and V1 and Z and V2 together with the group N-Q1-N or N-Q2-N independently also represents a divalent heterocyclic radical, An (-) represents the anion of an organic or inorganic acid, and n is 1 or 2, with the proviso that an optional aftertreatment of the cellulose material is carried out according to a padding process.