Blended, polymeric, matrix membrane and process of making and using same
US4377481A · kind A · utility
31Cited by
4References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1980 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Nov 14, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/4011
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A blended, polymeric membrane which comprises a water-insoluble matrix polymer and a water-insoluble copolymer compatible and blended with the matrix polymer, which copolymer is prepared by a copolymerization of a first monomer which, when homopolymerized, would result in an incompatible homopolymer with the matrix, and a second monomer which, when homopolymerized, would result in a compatible homopolymer with the matrix, one or both of the monomers containing positive or negative functional groups, to provide a blended, compatible, water-insoluble membrane for use in a reverse-osmosis and ultrafiltration processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.