Charge mosaic membrane, its production process, method of its use, and apparatus provided with the same
US6663775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2339/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A charge mosaic membrane having excellent selective permeability comprises a cationic polymer component, an anionic polymer component and a matrix component. Both of the cationic polymer component and the anionic polymer component are crosslinked particulate polymers. The matrix component is at least one polymer selected from a polysulfone resin, a polyarylate resin, a polyamide resin, a polyimide resin, a polyamideimide resin, a polyurethane resin, a fluorinated resin or a silicone resin. The charge mosaic membrane can be easily produced by conducting formation of the membrane by using a composition in which the cationic polymer component and the anionic polymer component are both dispersed in a solution of the matrix component in an organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.