Low resistivity polymeric PTC compositions
US6579931B1 · kind B1 · utility
2Cited by
7References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Feb 25, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Positive temperature coefficient (“PTC”) materials for use in electronic components for the protection of electrical circuits. Through the use of an organo-metallic coupling agent, the room temperature resistivity of polymeric PTC materials may be reduced. The PTC materials of the present invention include a polyolefin, a conductive filler and an organo-metallic coupling agent, and have an electrical resistivity at 25° C. of less than 1 ohm cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.