MEMBRANES COMPRISING A POROUS SUPPORT AND A FILM OF FLUORINE-CONTAINING POLYMER

摘要

A laminate comprising a first layer of fluorinated polymer containing pendant side chains containing sulfonyl groups wherein the sulfonyl groups are in the -(SO3)nMe form wherein Me is a metallic cation or NH4 and n is the valence of Me and a second layer of fluorinated polymer containing pendant side chains containing sulfonyl groups wherein the sulfonyl groups are in the -SO2M form wherein M is a halogen atom, said second layer being integral with said first layer and containing support material completely encapsulated therein; and a process for preparing such; said laminate being useful as an intermediate for an ion exchange membrane.