Patent ID: 6484887
Filing Date: 2002-11-26
Classification: B01D,C08J

Abstract:
An ion-selective membrane comprisingat least one ionic polymer component selected from the group consisting of a cationic polymer component and an anionic polymer component; a matrix component; and a woven-fabric-shaped backing in the matrix component, wherein each of the at least one ionic polymer component comprises particles evenly dispersed in the matrix component, where the particles have an average particle size in a range of from 0.01 to 10 &mgr;m; the woven-fabric-shaped backing has a meshed structure; the cationic polymer component is prepared from monomers of chloromethylstyrene and divinylbenzene; the anionic polymer component is prepared from monomers of styrene, acrylonitrile, hydroxyethylmethacrylate and divinylbenzene; the matrix component comprises at least one polymer selected from the group consisting of polysulfone resins, polyarylate resins, polyamide resins, polyimide resins, polyamide-imide resins, polyurethane resins, fluorinated resins, silicone resins, and hydrogenation products of homopolymer or copolymer resins of diene monomers; and the ion-selective membrane is produced by a process comprising contacting with the woven-fabric-shaped backing a coating formulation consisting of a mixture or dispersion of the particles of the at least one ionic polymer component, the matrix component and a solvent.