Foam in place conductive polyurethane foam
US4931479A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Nov 7, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An electrically conductive elastomeric foam for use in EMI/RFI shielding applications, especially as a gap filler or caulk. The foam is based upon a polyurethane system wherein the electrically conductive filler is intermixed with either the isocyanate or active hydrogen containing component before reacting the two components to create the foam. The foam is lightweight, flexible, highly conductive, capable of withstanding cyclical vibration and is capable of adhering to various conductive surfaces such as metal, composites and glass. The foam is preferably room temperature curable and consists of a water activable prepolymer or quasi prepolymer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.