| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane which is excellent in water permeability and salt rejection, and contains an extremely small amount of unreacted multifunctional amine components, and its production method. SOLUTION: In the composite semipermeable membrane where a skin layer comprising a polyamide resin made by the interfacial polymerization of a multifunctional amine component and a multifunctional acid halide component is formed on the surface of a porous substrate, after the formation of the skin layer, the content of the unreacted multifunctional amine component before washing the membrane is≤200 mg/m<SP>2</SP>, and the content of the unreacted multifunctional amine component after washing the membrane is≤20 mg/m<SP>2</SP>. COPYRIGHT: (C)2006,JPO&NCIPI
|
