REVERSE OSMOTIC COMPOSITIC MEMBRANE HAVING ACTIVE LAYER OF AROMATIC POLYESTER OR COPOLYMER OF AROMATIC POLYESTER AND AROMATIC POLYAMIDE

摘要

In the present invention, a solution prepared by dissolving a water-soluble polyhydric phenol having a polymer porous membrane support and two or more hydroxyl reactors thereon and an aromatic acyl halide having two or more reactors in an organic solvent or two or more hydroxyls thereon It is formed by interfacial polymerization of a mixed aqueous solution prepared by mixing an aqueous solution of an aromatic amine having two or more amine reactors with an aqueous solution of a polyhydric phenol having a reactor and an aromatic acyl halide having two or more reactors in an organic solvent. A composite membrane for reverse osmosis comprising a crosslinked aromatic polyester active layer or a copolymer active layer of an aromatic polyester and an aromatic polyamide is provided. The reverse osmosis composite membrane of the present invention has the conditions necessary for application as a reverse osmosis membrane, that is, water permeability, chlorine resistance, oxidation stability, salt rejection rate, durability and the like.