Study of some chemical properties of sulfonated vinylsulfonyl reactive dyes

Abstract

The authors have synthesized a water-soluble vinylsulfonyl reactive dye and its alcoholysis products. Gel chromatography was used to separate and purify these compounds. The determination of the reaction rate constants of the alkaline hydrolysis and alcoholysis of the vinylsulfonyl reactive dye has been made by the ion-pair reversed-phase HPLC technique. The ratio of reaction rate constants of this reactive dye with n-propanol, isopropanol and water is 1.00:0.19:0.52. The reaction rate constants of the alkaline hydrolysis of the model dye-fiber compounds have also been determined by the same method. The ratio of hydrolytic reaction rate constants of dye-primary ether bond to dye-secondary ether bond is 0.92:1.00.