Studies on Synthesis of Some Bisazo Reactive Dyes and Their Application on Various Fibres

N. B. Patel, S. K. Patel and K. C. Pater

Department of Chemistry, South Gujarat University, Surat - 395 007 , India.

Bis azo reactive dyes have been prepared by coupling diazotised 4,4'-methylene-bis anthranillc acid with various o-toluidino cyanurated coupling components and their dyeing performance as reactive dyes has been assessed on wool, silk and viscore rayon. These dyes have been found to give a wide range of yellow to maroon shades with very good depth and levelness on each fibre. The purity of all dyes have been checked by thin layer chromatography. The IR spectra showed all characteristic band present in the dye molecules and a representative dye PMR spectra showed all the signals. The percentage dye bath exhanstion and fixation on different fibre has been found to be reasonably good and acceptable. The dyed fibres show fair to good fastness to light, washing and rubbing.

4,4'-methylene-bis; anthranilic acid; Bis-azo reactive dyes; Deying; Viscose rayon; wool and silk