Microporous peek membranes and the preparation thereof
US4992485A · kind A · utility
41Cited by
5References
32Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 11, 1988 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Oct 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24504
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A microporous polyetheretherketone (PEEK) membrane in the form of films and hollow fibers formed without sulfonating the PEEK polymer. Solid fibers and articles are also claimed. A method of making membranes, fibers and articles from solutions of PEEK in non-sulfonating acid solvents in claimed. Solvents include methane sulfonic acid and trifluoromethane sulfonic acid. Sulfuric acid may be used as a diluent in non-sulfonating amounts. PEEK membranes are used as supports for composite ultrafiltration and reverse osmosis membranes. A method of making membranes, fibers, and articles is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.