FLUID COMPOSITION FOR PRODUCING AND REPAIRING ION EXCHANGE MEMBRANES

摘要

Fluid composition containing ion exchange copolymer which is perfluorated with functional groups -SO3M, M-hydrogen ions or ions of alkaline metals (EM higher than 900) and a polar organic solvent or a mixture of a polar organic solvent and a non polar solvent and, as perfluorated ion exchange copolymer, the composition contains a perfluorated ion exchange copolymer having a crystallinity grade from 2 to 10 % and a ratio between the density of the indicated ion exchange copolymer and the density of the original perfluorated copolymer in non ionic form between 0.9 and 0.97. The proportion of the components is in % by weight: perfluorated ion exchange copolymer 1-35; polar organic solvent or mixture of polar organic solvent with non polar solvent 65-99. Such compositions are used in the production and repair of ion exchange membranes (IEM) which are used in the alkaline electrolysis with chlorine or in the water electrolysis in fuel/gas separation cells.