Polymeric compositions for membranes
US4207182A · kind A · utility
33Cited by
6References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1976 |
| Grant date | Jun 10, 1980 |
| Priority date | — |
| Expiry date | Nov 10, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249981
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mixture of at least one non-sulphonated polysulphone and at least one sulphonated polysulphone, this mixture consisting of 10 to 30% by weight of a sulphonated polysulphone which has a theoretical exchange capacity of from 500 to 1,200 meq/kg is provided. Such mixtures enable one to obtain semi-permeable membranes using relatively concentrated solutions of the mixtures. The resulting membranes are particularly suitable for use in ultrafiltration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.