High dye fixation efficiency single-step dyeing and DP finishing process with polymethylol dyes and DMDHEU

Abstract

Polymethylol dyes were synthesized to achieve high dye fixation efficiencies, especially in single-step dyeing and durable press (DP) finishing process with DMDHEU. The treating conditions, including the composition of catalysts, the concentrations of the polymethylol dyes, and the concentrations of catalysts, have been studied for obtaining the optimum performances of the treated cotton fabrics. The optimum conditions were applied to a novel single-step dyeing and DP finishing process with DMDHEU (or etherified DMDHEU). As the results demonstrated, the dye fixation efficiencies could achieve >>97 % by using this method. At the same time, the other performances (wrinkle recovery angle, tearing strength, tensile strength, wash fastness, and crocking fastness) were similar to those from the traditional two-step dyeing and DP finishing process.