Synthesis, Characterization and Textile Application of Novel Disperse Dyes

Two novel alkali clearable disperse dyes were synthesized. 4-fluorosulfonyl aniline and 2-nitro-4-fluorosulfonyl aniline were utilized as the diazo components and 2- naphthol as the coupling component. The DSC, FT-IR, 1H-NMR and UV-Vis analyses were used to characterize the synthesized intermediates and dyes. The synthesized dyes were utilized to dye polyester fibers and their dyeing properties were studied. In addition, hydrolysis kinetics of the synthesized dyes in alkaline media was investigated. The results showed that the synthesized dyes had good properties on polyester fabrics. As a result of the synthesized dyes hydrolysis in alkaline media, the reduction clearing process is supposedly replaced by alkali-clearing process. The elimination of sodium hydrosulfite leads to the reduction of environmental pollution. One of the main advantages of replacing reduction-clearing method by alkali-clearing is preventing toxic and carcinogenic aromatic amines to be produced.