Composite membrane
US5259950A · kind A · utility
19Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/125
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite membrane excelling in organic solvent resistance, heat resistance and organic vapor resistance is disclosed. The composite membrane of the present invention comprises a porous membrane including as a major constituent a polymer having a repeating unit represented by the formula (I) EQU --Ph--S--Ph--SO.sub.2).sub.n (I) (wherein Ph represents phenyl group, n represents a natural number) and an active layer formed on said porous membrane. The composite membrane of the present invention may be used as a composite membrane for pervaporation, gas separation membrane and as a reverse osmosis membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.