| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane having high water permeability.SOLUTION: This invention provides a production method to obtain a composite semipermeable membrane by the production method in which, on a fine porous support membrane having a base material and a porous support layer, a polyfunctional amine and a polyfunctional crosslinking agent comprising a polyfunctional active ester are reacted with each other to form a separation function layer. In the composite semipermeable membrane, the polyfunctional active ester has a cyclic imide structure, a halogenated aryl structure, or a nitroaryl structure.</p> |
