Conductive polyurethane foam compositions and method for producing same
US5567740A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to three-dimensional expanded polyurethane foam materials, such as flexible reticulated polyurethane foam compositions, that are electrically conductive and have antistatic properties. More specifically, the invention relates to a polyurethane foam having long-lasting and reliable electrical conductivity characteristics and a volume resistivity of approximately 10.sup.12 ohm.multidot.cm or less at ambient room temperature (about 70.degree. F.). This foam is produced by combining conventional polyurethane foam-forming reactants and an effective amount of an antistatic agent such as tetracyanoquinodimethane (TCNQ) or sodium perchlorate under foam-forming conditions. In one preferred embodiment, the conductive foam is subsequently reticulated by momentary exposure to a flame front.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.