Title:
COMPOSITE SEMIPERMEABLE MEMBRANE AND SPIRAL SEPARATION MEMBRANE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2018/079589
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a composite semipermeable membrane which has three excellent properties, namely, excellent ionic substance blocking performance, excellent nonionic substance blocking performance and excellent water permeability in a practically balanced manner; and a spiral separation membrane element which comprises this composite semipermeable membrane. A composite semipermeable membrane according to the present invention is obtained by forming a skin layer that contains a polyamide resin on the surface of a porous supporting body, and is configured such that: the polyamide resin is obtained by polymerizing a polyfunctional acid halide component and a polyfunctional amine component; the polyfunctional amine component contains m-phenylenediamine and at least one diamine compound represented by general formula (1); and the ratio (in mol%) of a segment (A) derived from m-phenylenediamine to a segment (B) derived from the diamine compound in the polyamide resin is from 99.9:0.1 to 98:2 (segment (A):segment (B)). (In the formula, one of R1 and R2 represents COOH, and the other represents a hydrogen atom; and each of R3 and R4 independently represents a hydrogen atom or an alkyl group having 1-4 carbon atoms.)
More Like This:
Inventors:
MIYABE TOMOTSUGU (JP)
ECHIZEN MASASHI (JP)
HITOUJI KAZUSA (JP)
ECHIZEN MASASHI (JP)
HITOUJI KAZUSA (JP)
Application Number:
PCT/JP2017/038486
Publication Date:
May 03, 2018
Filing Date:
October 25, 2017
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B01D71/56; B01D63/10; B01D69/10; B01D69/12; C08G69/26; C08J9/36
Foreign References:
| JP2004237230A | 2004-08-26 | |||
| JP2014210246A | 2014-11-13 |
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (JP)
Download PDF:
Previous Patent: MOVEMENT GUIDING DEVICE AND TRANSPORT DEVICE
Next Patent: MANAGEMENT SYSTEM, BICYCLE, CONTROL METHOD, AND STORAGE MEDIUM
Next Patent: MANAGEMENT SYSTEM, BICYCLE, CONTROL METHOD, AND STORAGE MEDIUM