Conductive polymer compositions
US4910389A · kind A · utility
367Cited by
7References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1988 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Jun 3, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A conductive polymer composition which exhibits PTC behavior comprises a crystalline organic polymer, carbon black, and a high resistivity particulate filler. The high resistivity filler is semiconductive and has a resistivity at least 100 times that of the carbon black. Compositions of the invention exhibit good resistance stability when exposed to thermal cycling. They are useful in electrical devices requiring compositions with high resistivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.