Conductive polyurethane foam and process of contacting a polyurethane foam with a mixture of swelling agent and chemical additive
US4578406A · kind A · utility
7Cited by
13References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Dec 20, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Polyurethane foam is modified by a post-treatment process comprising the steps of contacting the polyurethane foam with a swelling agent for the polyurethane foam and interpenetrating the swollen foam with a chemical additive, then shrinking the interpenetrated foam by removing the swelling agent under conditions where the chemical additive remains trapped in the polymeric structure of the foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.