METHOD FOR PRODUCING COMPOSITE SEMIPERMEABLE MEMBRANE

摘要

The purpose of the present invention is to provide: a composite semipermeable membrane that has excellent oxidation resistance compared to the prior art; and a method for producing the composite semipermeable membrane. The method for producing a composite semipermeable membrane is characterized by: comprising a step in which an amine solution containing a polyfunctional amine component and an organic solution containing a polyfunctional acid halide component are brought into contact on a porous support body and a skin layer containing a polyamide resin is formed on the surface of the porous support body; the polyfunctional amine component containing N,N'-dimethylmetaphenylenediamine; and by the solvent of the organic solution being an organic solvent that has a boiling point of 130-250 °C.