To combine the favorable characteristics of disperse and reactive dyes on nylon, means the excellent coverage of fiber irregularities of disperse dyes and high wet fastness of reactive dyes, the reactive disperse dyes were synthesized. In this study two reactive disperse dyes containing cyanuric chloride, on base of azo disperse dyes were synthesized. After recrystallization of disperse dyes from acetone, the precipitate was reacted with the cyanuric chloride at 0-5oC and weak acidic conditions. The synthesized dyes were extracted with dichloromethane, the products were precipitated and identify by FT.IR, UV-VIS and elemental analysis. The synthesis dyes were ball milled to decrease the particle size and increase the solubility of dyes. The synthesized dyes were applied on Conventional and nanofiber nylon 6. In the dyeing of nylon fibers with synthesised dyes, the effect of pH and dye concentration on the percent exhaustion was examined. Particles size change with the milling time of the dye was followed by percent exhaustion on nylon. Also particle size of dye A was measured by SEM. The adsorption isotherms of the synthesized dyes were investigated. Standard affinity was measured by the slop of the adsorption isotherm plots. The results describe that the standard affinity were increased as more coplanar structure. The diffusion coefficient was calculated by measuring the dye concentration in the fiber at different times. The results show that the dyes with hydroxy group which cause less aggregation, have a higher diffusion coefficient. To remove the unfix dyes, after dyeing the dyed samples, enter into a solution of sodium bicarbonate and then the wet and light fastness were measured. The results show that the synthesized dyes can be applied to nylon and wet fastness is good and light fastness is moderate. Keywords: Disperse reactive dye, Cyanuric chloride, Nylon 6, ball mill, physical chemistry of absorbtion.
