Journal Article

Synthesis of 5arylazo2arylidenehydrazinothiazole disperse dyes for dyeing polyester fibres

Metwally, M.A., AbdelLatif, E., Khalifa, M.E., Amer, F.A.

2009

Overview

Purpose The purpose of this paper is to synthesise some new 5arylazothiazole disperse dyes and study their application in dyeing polyester fibres. Designmethodologyapproach A series of 5arylazo2arylidenehydrazino4substitutedthiazole dyes were prepared by cyclocondensation of hydrazonoyl bromides with various thiosemicarbazone derivatives. Findings The dyed fibres exhibit very good washing, perspiration, sublimation and light fastness properties with little variation in the moderate to good rubbing fastness. The ease of preparation and the acceptable fastness properties makes these dyes particularly valuable. Research limitationsimplications In the present paper, the synthesis of 5arylazo2arylidenehydrazinothiazole disperse dyes was achieved by one step pathway. In addition, the variations in substituents on the aryl and thiazole moieties could also be studied. Practical implications The new arylazothiazole disperse dyes are superior in terms of yield, purity, colour strength, and having fastness properties of an order acceptable for commercial utilisation. Originalityvalue The synthesised disperse azo dyes are superior in terms of preparation, yield, purity, and fastness properties.

• Publisher: Emerald Group Publishing Limited
• Subject: Colours technology / Dyes / Manmade fibres / Polymers