Synthesis and Dyeing Properties of an Acid Blue Dye Derived from Naphthalimide on Polyamide Fibers

In this manuscript, synthesis of an acid dye by diazotization of 4-amino-9-metyoxypropyl naphthalimide with nitrosyl sulfuric acid and coupling with J-acid has been reported. The synthesized dye was purified and characterized by use of DSC, 1HNMR, FTIR and Uv-vis techniques. The synthesized dye was applied on polyamide fibers and its dyeing properties such as build up, fastness properties and color characteristics were investigated. The measured spectrophotometric attributes of dyed fibers showed that the synthesized dyestuff has a good build up and creates bluish red on polyamide fibers. In addition, assessment of fastness properties of dyed fibers showed that the synthesized dyestuff has relatively acceptable results on polyamide fibres.