Electrical devices having improved PTC polymeric compositions
US5880668A · kind A · utility
330Cited by
45References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Aug 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Circuit protection devices comprising PTC elements and circuits containing such devices. The PTC element includes a crystalline conductive polymer composition comprising a conductive particulate filler grafted to a modified polyolefin. The modified polyolefin comprises a polyolefin having a carboxylic acid or a carboxylic acid derivative grafted thereto. The conductive particulate filler is grafted via an esterification reaction to the modified polyolefin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.