Process for making polyarylethers and use in membrane preparation
US9353220B2 · kind B2 · utility
7Cited by
15References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2013 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Jun 24, 2034 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2331/301
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for making polyarylethers provides a reaction mixture that includes a dipolar aprotic solvent for polyarylether and polyarylether forming reactants, and reacts the polyarylether-forming reactants, with removing of water with nitrogen in the absence of azeotrope forming cosolvent and optionally replacing removed amounts with dipolar aprotic solvent. The process can further include directly wet spinning the reactor solution without recovery of the polymer from the dipolar aprotic solvent through a spinneret to form hollow fibers or flat sheets suitable for membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.