Process for forming membrane having a hydrophobic fluoropolymer surface
US5554414A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Apr 12, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D5/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite porous article is formed from a porous polymeric substrate having its entire surface modified with a cross-linked polymer which results in a hydrophobic and oleophobic surface. The composite retains substantially all of the other original properties of the substrate. The cross-linked polymer is formed in situ on the polymeric substrate from a reactant system comprising an ethylenically unsaturated monomer having at least one fluoroalkyl group, a cross-linker, and, if needed, a polymerization initiator, dissolved in a polar solvent system. The porous substrate saturated with the reactant system is exposed to a suitable energy source to effect polymerization and cross-linking of the monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.