Synthesis of Some Azo Disperse Dyes from 1-Substituted 2-Hydroxy-6-pyridone Derivatives and Their Colour Assessment on Polyester Fabric

Kurenkaka Johnson Sakoma, Kasali Ademola Bello, Mohammed Kabir Yakubu

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Department of Textile Science and Technology, Ahmadu Bello University, Zaria, Nigeria.

DOI: 10.4236/ojapps.2012.21006                

Abstract

The synthesis of a series of 3-(p-substituted phenylazo)-6-pyridone dyes which is suitable for the dyeing of polyester fabrics, is described. Visible absorption spectra of the dyes were examined in various solvents and the compounds in solution exhibited hydrazone-common anion equilibrium. The electronic absorption spectra cover a λ_max range of 404 - 464 nm in DMF at uniformly high absorption intensity between 5.33 × 10⁴ - 8.55 × 10⁴ lmol^–1cm^–1 and gave bright intense hues of yellow to orange on polyester fabrics. The colour parameters of the dyed fabrics were measured and the dyes have excellent exhaustion between 72% - 79% for polyester fabrics, more intense and of very good fastness properties on polyester fabrics. The remarkable degree of levelness and brightness after washing is indicative of good penetration and excellent affinity of these dyes for the polyester fabric.

Keywords

Pyridone; Disperse Dye; Exhaustion; Carrier; Polyester; Fastness

Conflicts of Interest

The authors declare no conflicts of interest.

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