A FLUID IMPERMEABLE CATION EXCHANGE MEMBRANE, PROCESS FOR ITS PREPARATION, ELECTROCHEMICAL CELL COMPRISING SAID MEMBRANE AND AN ELECTROLYTIC PROCESS USING SAID MEMBRANE

摘要

Cationic membranes permeable to ions but fluid impermeable comprising a partly sufonated terpolymer of styrene, divinylbenzene and at least one member of the group consisting of 2-vinylpyridine, 4-vinylpyridine and acrylic acid, the degree of sulfonation varying through the membrane cross-section from a maximum at the anodic surface to a minimum at the cathodic surface, their preparation, their use in electrolysis cells and electrochemical processes.