SYNTHESIS OF SOME PYRIDONE AZO DYES FROM 1-SUBSTITUTED 2-HYDROXY-6-PYRIDONE DERIVATIVES AND THEIR COLOR ASSESSMENT

The synthesis of a series of 3-(p-substituted phenylazo)-6-pyridone dyes, which are suitable for the dyeing of polyester fabrics, is described. Characterisation of the dyes was carried out by spectral and elemental analysis. The colour parameters of the dyed fabrics were measured. The assessment of colour was made in terms of CIE tristimulus values. The Helmholtz coordinates (λD, Y, P%) and the position of colour in CIELAB coordinates (L*, h*ab, C*ab) are reported. The correlation between colour and structure of the dyes is discussed. © 1990.