Synthesis and characterization of di j acid urea based direct dyes

Abstract

Textile industry is the back bone of Pakistan economy and largest contributor of country’s export. It is anticipated that about 59% of the country’s total export, 43% of industrial manufacture and 40% of employed industrial work force is being working in textile industry. Textile sector consumed huge amount of Dyes and pigments, among them major market share are of pigments and reactive dyes. Approximately direct dyes have only 25 % market share. Being relatively cheap, easy to manufacture and application without any mordant ,direct dyes market share could be increase which will save foreign remittances. Direct dyes based on di J acid urea have been synthesid and characterized in order to investigate the fastness, color strength and substantivity. Various characterization techniques like UV-Vis spectrophotometer (for λ) and FTIR (For functional group)were deployed to check wavelength in visible spectra and ensure the required functionalized chromogens. Fastness properties observed are of better quality by different ISO standards of fastness (Light,Washing,Crock) against temperature variation. Color strength K/s studied by empirical relation of kubelka munk equation.improved results have been observed.