Process for producing semipermeable membranes
US4107049A · kind A · utility
22Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1976 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Oct 27, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/755
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the preparation of semipermeable membranes is disclosed which comprises exposing porous shaped articles of polyacrylonitrile or copolymers containing acrylonitrile in an amount of more than 40% by mole to a plasma consisting essentially of a gaseous organic compound or the mixture of said gaseous organic compound and an inert gas at room temperature under a pressure of 0.01 to 10 Torr.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.