Crosslinking formulations based on novel reactive disperse dyes for printing cotton fabrics

Abstract

Cotton cellulose is an excellent natural material due to its outstanding characters. Five novel crosslinking reactive disperse dyes containing bi-functional groups, two 3-chloro-2-hydroxypropyl groups, were synthesized and characterized by infrared spectroscopy, proton magnetic resonance spectroscopy and element analysis. The solvent effect on the color of the dyes was assessed by the electronic absorption spectra. The crosslinking printing properties of the five dyes (D1–5) for cotton fabrics were investigated. The electronic absorption property exhibited larger bathochromic shifts in a stronger polar solvent than in the weaker polar solvents. The crosslinking reaction between two 3-chloro-2-hydroxypropylreactive groups and the hydroxyl group of cellulose could take place. The higher color yield and excellent fixation were obtained. The building up property was good for all the dyes on cotton fabric. The printed samples had excellent washing, perspiration and rubbing fastness. The light fastness for cotton fabrics was moderate.