Abstract:
A series of mono and di-chlorotriazinyl based reactive red dyes were synthesized containing the common H-acid nucleus with different reactive coupling groups-sulfanilic acid, metanilic acid, orthanilic acid, anthranilic acid and tobias acid. These syntheses were monitored by thin-layer chromatography (TLC). The solubility of the synthesized dyes was investigated in water at various temperatures. Their Spectrophotometric data indicated significant alteration in their λmax values which corresponded to the nature of the substituents (-SO₃H₃ -COOH) of the diazocomponents used. The bi-functional bridged reactive dyes, containing the derivatives of anthranilic acid (KPR-15, KPR-16) showed the highest secondary exhaustion degree from the dyebath while derivatives of tobias acid showed the highest fixation ratio (KPR-19, KPR-20). The improved fastness properties of perspiration, washing and light were investigated. The fabrics with an intense color and good characteristics were obtained, thus presenting a possibility for the extension of usually applied reactive red dyes.
