SYNTHESIS OF POLYCONDENSABLE ANTHRAQUINONE DYES AND COLORED NYLON FIBERS .2.

Without addition of any metal ions or other catalysts, 1-chloroanthraq uinone reacts readily with 6-aminocaproic acid or hexamethylenediamine in dimethylsulphone as solvent to give 1-(6-aminocaproic acid)anthraq uinone and 1-(6-aminohexyl)amino]anthraquinone, respectively. 1,5-Dich loroor 1,8-dichloroanthraquinone can also be used in this reaction to give bis-substituted derivatives of anthraquinone. As a kind of functi onal dye, which contains -COOH or NH2 groups and dissolves easily in n ylon melt, the products were designed for preparing coloured nylon by polycondensation with caprolactam or nylon-6,6 salt. Nylon fibres with different colours were obtained directly.