Conductive polyurethane foam and its manufacture
US5591482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Feb 17, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a conductive polyurethane foam in which the polymerization is made easy, the refinement of pyrrole or the like is not required, the recovery rate of a solvent is enhanced, and the pre-treatment is not required at all; and a conductive polyurethane foam having excellent performances. This method includes a process: of coating an oxidizer solution (methanol solution containing FeCl.sub.3 and FeCl.sub.2) on surfaces of cells of a soft polyurethane foam; a process of perfectly removing the solvent of the oxidizer solution by vacuum drying; a process of polymerizing a compound (pyrrole or the like) with conjugated double bonds on the surfaces of cells of the continuous forming type polyurethane foam after being coated with the oxidizer in a vapor-phase atmosphere for forming a conductive electronic conjugated polymer layer (polypyrrole layer or the like) of the compound on the surfaces of the cells; a process of dipping the polyurethane foam formed with the polymer layer in a solvent for extracting the pyrrole and the oxide; and a process for vacuum-drying it. A conductive polyurethane foam can be continuously manufactured by this process. The conductive polyur…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.