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

Abstract

A series of 3-(p-substituted phenylazo)-6-pyridone dyes that can be used to dye polyester fabrics are created, and its synthesis is discussed. Various solvents were used to analyse the dyes' visible absorption spectra, and it was discovered that the compounds in solution displayed an equilibrium between hydrazone and common anion. The electronic absorption spectra cover a \(\lambda\)max range of 404 -464 nm in DMF at uniformly high absorption intensity between 5.33 × 104 - 8.55 × 104 l·mol–1·cm–1 and gave bright intense hues of yellow to orange on polyester fabrics. The dyes have great exhaustion between 72% and 79% for polyester fabrics, are more intense, and have very good fastness properties on polyester fabrics, according to measurements of the colour parameters of the dyed materials. The extraordinary level of levelness and brightness after washing is a sign of good penetration and strong affinity of these dyes for the polyester fabric.