Verfahren zur Herstellung von basischen Azoverbindungen

摘要

Basic azo dyes are of formula:- nwhere R1 is H, halogen, alkyl or alkoxy; R2 is H, alkyl, aryl or the group (where R3 is H or alkyl and both R4 and R5 can be H, alkyl, cycloalkyl or aryl residues) W1 is a residue containing at least one quaternary N atom (e.g. thiazole, benzthiazole)). Suitable for the dyeing and printing of polyacrylonitriles and also modified synthetic polyamides and polyesters. Also can be used for leather, paper and tanned cotton. Mainly blue shades of good light and washing fastness, good pH stability and they reserve wool.