Acceleration of dioctyl dimethyl ammonium bromide to reactive dyeing of silk

In order to improve the fixation rate of reactive dyeing of silk and reduce the dosage of accelerant,with dioctyl dimethyl ammonium bromide( DODMAB) as accelerant,the accelerating rule of dyeing of silk with three reactive dyes was studied. The results showed that DODMAB was a high efficiency accelerant for silk dyeing with reactive dyes. When the concentration of DODMAB was 4 g / L,dye uptake rate of Reactive Red B-3BF,Reactive Yellow B-4RFN and Reactive Dark Blue B-2GLN reached 98. 7%,95. 32% and 94. 96%,and fixation rate was 96. 3%,89. 18% and 90. 28%,respectively; soaping fastness of the silk dyed with the three reactive dyes was all up to 4-5 grade; and the adsorption kinetics of the three reactive dyes on silk with DODMAB as the accelerant were found to follow the pseudo second-order kinetic model.