Search International and National Patent Collections

1. (WO2018124103) COMPOSITE SEMI-PERMEABLE MEMBRANE AND METHOD FOR PRODUCING SAME

Pub. No.:    WO/2018/124103    International Application No.:    PCT/JP2017/046726
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 27 00:59:59 CET 2017
IPC: B01D 69/12
B01D 71/40
B01D 71/56
B32B 5/18
B32B 27/34
Applicants: TORAY INDUSTRIES, INC.
東レ株式会社
Inventors: HAMADA Tsuyoshi
浜田 剛志
OKABE Jun
岡部 淳
OGAWA Takafumi
小川 貴史
Title: COMPOSITE SEMI-PERMEABLE MEMBRANE AND METHOD FOR PRODUCING SAME
Abstract:
The purpose of the present invention is to provide a composite semi-permeable membrane capable of achieving excellent fouling resistance over a long period of time. The present invention pertains to a composite semi-permeable membrane comprising: a supporting membrane (a substrate and a porous supporting layer); and a separation function layer that is provided on the porous supporting layer and includes a crosslinked polyamide and a hydrophilic polymer, the composite semi-permeable membrane satisfying condition (A) (the hydrophilic polymer includes a positively-charged functional group and a negatively-charged functional group, and the hydrophilic polymer is negatively charged); and condition (B) (the hydrophilic polymer is covalently bonded to the crosslinked polyamide).