Semi-permeable composite membrane and process for manufacturing same
US5207908A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1991 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Jun 5, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/1251
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a semi-permeable composite membrane with a porous carrier substrate whereon a polymer network obtained by interfacial polymerization is applied, said network comprises an additional polymer. According to the present invention said additional polymer is dissolved in the water phase or in the organic phase, from which said interfacial polymerization occurs, which additional polymer is molecularly entangled in said network and may regulate in particular the selectivity and the permeability of the composite membrane. PA1 Preferably the additional polymer is a non-reactive polymer. PA1 Furthermore, the invention relates to a process for manufacturing the above-mentioned semi-permeable membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.