Melting-reactive dyes for mass coloration of synthetic fibres (II)¯¯1,4-dihydroxyanthraquinone diglycidyl ether in nylon

Mass coloration of nylon using a melting-reactive dye is described. 1,4-Dihydroxyanthraquinone diglycidyl ether was synthesized as a novel melting-reactive dye in which the epoxy groups in the dye would react with amino groups of nylon by a nucleophilic addition mechanism. The dye was confirmed by UV¯vis, IR and 1H NMR spectroscopic analyses. The effect of the proportion of the added dye on the intrinsic viscosity of the polymer was studied. Thermal analysis showed high thermal stability and blending compatibilization. The light fastness of the coloured fibre was measured.