Dyeing of Wool-Polyester Blends with Reactive Disperse Dyes: Variation of Dye Distribution and Reactivity for Wool

The dyeing behaviour of structural analogues of some commercial reactive disperse dyes on a simulated 70:30 wool-polyester blend has been studied. By varying the hydrophilic-hydrophobic balance of the dye molecule major changes in the distribution of dye between wool and polyester were observed. The reactivity of the gamma-halo-beta-hydroxypropyl group was found to be dependent on the halogen atom, while the reactivity of the N-bromoalkylsulphonamide group was found to be dependent on the position of the bromine atom