DYES, THEIR PREPARATION AND USE IN THE COLORATION OF SUBSTRATES

摘要

A process for the coloration of a substrate, especially a textile, comprising the steps of: a) applying to the substrate a mixture comprising an aqueous solvent and a water-soluble dye comprising molecules which contain a nucleophilic group and an electrophilic group; and b) heating or basifying or heating and basifying the dye thereby causing molecules of the dye to join together. Also claimed are dyes, polymers and oligomers.