Use of β‐cyclodextrin in an antimigration coating for polyester fabric

When β‐cyclodextrin was adopted as a dye catcher, the degree of dye migration onto adjacent fabrics as well as onto the coated surface was greatly reduced, while other physical properties, such as waterproofness and breathability, remained unaffected. When acetylation of β‐cyclodextrin was carried out, its solubility in an organic solvent, including methyl ethyl ketone and toluene, was greatly improved. Hence, it provided a smoother coated surface and an excellent antimigration effect in a direct‐coating system. These results confirm that β‐cyclodextrin is an effective dye catcher in a polyurethane‐based coating system, in which it prevents the migration of the dyes from coated polyester fabrics onto adjacent surfaces. The solubility of cyclodextrin can be optimised by a chemical modification of its cyclodextrin‐hydroxyl groups. Hence, this host–guest interaction demonstrates a universal and effective platform for antimigration coating systems.