Dye-Fiber Bond Stabilities of Reactive Dyes Containing Phosphonic Acid Groups

Abstract

Dyes containing phosphonic acid groups as reactive links to be bonded to cellulose hydroxyl groups have been recently introduced into commercial use. In this investigation, the stability of the dye-fiber bond in reactive dyeings of this type on cotton fabrics has been determined by measurement of the rate of hydrolysis in the pH-range 2.2-8.6 at 98°C. The results demonstrate that this class of reactive dyes has dye-fiber bond stabilities that are in the same range as those of the other major classes of reactive dyes investigated previously. The dye-fiber bond stabilities reflect the wet-fastness properties of these dyeings.