Material having a resistivity with a positive temperature coefficient
US4966729A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1988 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Apr 4, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/027
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an electrically conductive, polymer based material with electrical resistivity having a positive temperature coefficient. The material comprises a matrix of thermosetting polymer having conductive particles in the form of fibers distributed through the polymer. The polymer can be an epoxy resin, polyimide, unsaturated polyester, silicone, polyurethane or phenolic resin, and the fibers can be carbon fibers, carbon fibers coated with metal or metal alloy, graphite fibers, graphite fibers coated with metal or metal alloy, graphite intercalation compound fibers, metal fibers, ceramic fibers, or ceramic fibers coated with a metal or metal alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.