Electrolytic cell membrane and method of preparation by plasma polymerization of polyamide or polytetrafluoroethylene thin films onto polymeric substrates
US4100113A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Apr 1, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is an improved hydraulically impermeable cation exchange membrane for an electrolytic cell and a method for the preparation of such a membrane using a copolymeric substrate and applying to the surface thereof by means of plasma polymerization, a very thin top coating of a second polymeric material to drastically reduce the permeability of the substrate material with a minimal effect upon the bulk properties of the resultant membrane. Such top coatings may be applied over the basic substrate or over surface treated substrates to enhance the chemical resistivity of the membrane to chemical breakdown occasioned by the electrolyte within the electrolytic cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.