Antrachinonfarbstoff,sowie Verfahren zu seiner Herstellung

摘要

The invention comprises water-soluble cationic anthraquinone dyestuffs of the general formula wherein X is oxygen, sulphur, or secondary amino, Y is hydrogen, methyl, methoxy or methylthio, R1 and R2 are hydrogen or alkyl, A is hydrogen, methyl, amino, methylamino, hydroxy, carboxy or a group of the formula n is 1 or 2 and Z is a quaternary ammonium, an isothiouronium or a ternary sulphonium group. The dyes are made by reacting compounds of the general formulae with a chloroacylamide and paraformaldehyde in concentrated sulphuric or polyphosphoric acid and treating the product with a tertiary amine, thiourea or an N-alkyl derivative thereof or an organic suphide. Examples are given. The dyes dye polyacrylonitrile and modified polyacrylonitrile fibres in blue, blue-red and blue-green shades.