Hydrophilic PVDF semipermeable membrane
US4810384A · kind A · utility
99Cited by
4References
9Claims
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Key dates
| Filing date | Jun 29, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Jun 29, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L27/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hydrophilic semipermeable membranes which retain their capacity for filtration, even after drying, and which are well adapted for either ultrafiltration or microfiltration, are comprised of at least 70% by weight of polyvinylidene fluoride (PVFD) and up to 30% by weight of a hydrophilic polymer compatible therewith, e.g., a cellulose acetate or sulfonated polysulfone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.