Melt-shapeable fluoropolymer compositions
US4624990A · kind A · utility
38Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1985 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Apr 4, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Melt-shapeable polymeric compositions comprising a first fluoropolymer of relatively low crystallinity, e.g. a copolymer of tetrafluoroethylene and a perfluorinated comonomer, and a second fluoropolymer of relatively high crystallinity, especially a fluoropolymer obtained by irradiating PTFE or another fluoropolymer which cannot be melt-shaped in the absence of other polymers. The weight ratio of the first to the second polymer is preferably 0.3:1 to 2.5:1. The compositions have a wide variety of uses, for example as insulating materials or, if they contain carbon black or another conductive filler, as PTC conductive polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.