Process for the preparation of ethylene/chlorotrifluoroethylene polymer membranes
US10173177B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2010 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | May 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process for the production of membranes based on ethylene/chlorotrifluoroethylene polymers having a melting temperature not exceeding 200° C. The process relies on the diffusion induced phase separation of the ethylene/chlorotrifluoroethylene polymer from a solution and comprises the steps of providing a solution comprising an ethylene/chlorotrifluoroethylene polymer having a melting temperature not exceeding 200° C. in a solvent; casting the polymer solution into a film; immersing the film in a non-solvent bath to precipitate the polymer. Membranes made of compositions comprising an ethylene/chlorotrifluoroethylene polymer having a melting temperature not exceeding 200° C. and at least one second polymer are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.