SYNTHESIS OF POLYCONDENSABLE ANTHRAQUINONE DYES AND COLORED NYLON FIBERS .1.

The reaction of dihydroxyanthraquinone (DHA) and amines in the presenc e of catalyst has been reported. We found that DHA reacted easily with hexamethylenediamine in chloroform or toluene without addition of any catalyst, and mono- or dihexamethylenediamine-substituted anthraquino ne, a violet green colourant, was formed. Using the colourant as a com onomer in the polycondensation of caprolactam or nylon-6,6 salt, colou red nylon-6 and nylon-6,6 fibres were prepared.