Water soluble fluorine containing reactive dyes: their synthesis and application on various fibres

摘要

Various cold brand reactive dyes have been prepared by coupling diazotised 4,4'-methylene bis-m-fluoro aniline with various cyanurated coupling components and their dyeing performance as reactive has been assessed on silk, wool and viscose 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 has been checked by thinlayer chromatography. The IR spectra showed all characteristic bands present in the dye molecules and PMR spectra of a representative dye showed all the characteristic signals of the dye. The percentage dye bath exhaustion and fixation on different fibres have been found to be reasonably good and acceptable. The dyed fibres show fair to very good fastness to light, washing and rubbing.