MODIFIED POLYURETHANES CONTAINING PERFLUOROALIPHATIC GROUPS, AND THEIR USE

摘要

The polyurethanes are obtained by reacting oligo(poly)urethanes containing free hydroxyl or isocyanate groups and perfluoroaliphatic groups with difunctional/polyfunctional polysiloxanes at elevated temperature with reaction of all the reactive groups of the urethane. …These compounds are used to produce oil-repellent and water-repellent finishes on fibre materials; the treated materials are not provided only with washing- and cleaning-resistant effects, but in particular also with a very soft, full handle with very good surface smoothness. These excellent handle effects are further optimised by the addition of a polyethylene dispersion and/or further conventional textile assistants, in particular water-repellent fluorocarbon compounds.