Coated perfluorosulfonic acid resin membranes and a method for their preparation

摘要

An improved cation-exchange membrane for use in electrolytic processes which is comprised of a film of a perfluorosulfonic acid resin having a fluoroalkyl resin coating. The improved membrane is produced by applying an uncured fluoroalkyl resin in liquid form to a surface of the film and curing the fluoroalkyl resin to provide a solid coating on the surface of the film. The improved membrane provides efficient ion separation properties at reduced costs for energy.