Synthesis of new azo dyes derived from phthalimide and studying their adsorption properties and fastness on polyamide

Abstract

The amino phthalimide was synthesized by the nitrification of phthalimide and then its hydrogenation. The amino phthalimide compound was described using spectroscopic methods: proton nuclear magnetic resonance, mass spectrometry, and Fourier transform infrared (¹HNMR-MS-FTIR). New acidic dyes were prepared by coupling the reaction for diazonium salt of amino phthalimide (prepared by diazotization reaction) with aromatic compounds. All of the synthesized dyes were characterized by FT-IR spectrums after purification by the thin layer chromatography technique (TLC). In addition, the azo group and other groups were recorded in the prepared spectrums dyes. Moreover, nylon 6 and nylon 6.6 were dyed with the prepared dyes. The researchers studied the ratio exhaustion and dye colorfastness to washing. The results showed the possibility of using dyes prepared in dyeing nylon.