Abstract
Various 4-Arylazo-1,3-benzenediamine (AABs) dyes have been synthesized and polycondensed with hexamethylene diisocyanate (HMDI). The resultant poly (4-arylazo-1,3-benzeneurea-hexamethylene)s (PABUs) have been characterized by elemental analysis, IR spectroscopy and number average molecular weight () (Estimated by non-aqueous conductometric titration). Thermal properties of PABUs have been examined by thermogravimetric analysis. Their dyeing performance on nylon and polyester was assessed. The dyeing had yellow, orange and pink shades with moderate-to-good light- and wash fastness. Polymerization of AABs with HMDI on dyed nylon and polyester has also been performed. The dyeing properties of simple AAB dyes were compared with the dyes polymerized on nylon and polyester.
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