Synthesis and Evaluation of Technical Properties of Novel Cationic Mono-s-chloro Triazinyl (MCT) Reactive Dyes on Cotton

Two novel cationic mono-s-chloro triazinyl (MCT) reactive dyes together with their analogues were synthesized via reacting an N,N-dimethyl dodecylamine with p-nitrobenzyl bromide. The resultant was reduced using stannous chloride and hydrochloric acid to produce the primary amine. The quaternary ammoniuin salt containing primary amine was then diazotized and coupled to H-acid/J-acid reacted with cyanuric chloride and sulfanilic acid. The analogue dyes were prepared via the same route without quaternary ammonium salt making stage. The dyes were characterized using FTIR, H-1 NMR, UV-Vis spectroscopy and elemental analysis. The substantivity, exhaustion and fixation of the dyes were investigated on cotton fabric. It was found that these functional dyes could be effectively introduced to cotton for achieving simultaneous coloration and functional finishing effects. All the dyed fabrics exhibited softening efficacy. The washing and light fastness of the dyed samples were further studied.