Conductive melt-processible fluoropolymer
US6582628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2002 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | May 21, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing an electrically conducting melt-processible fluoropolymer comprising pulverizing a composition of (a) carbon aggregate and (b) coagulum particles of aqueous dispersion polymerized melt-processible fluoropolymer, coating the coagulum particle with the disintegrated particles of carbon black. The preferred composition comprises a structured carbon black such as acetylene black and a melt processible fluoropolymer wherein said melt processible fluoropolymer has two crystallization peaks in a DSC cooling curve when allowed to crystallize from a temperature of not less than its melting point at a cooling rate of 12° C./min; and the ratio of the crystallization peak heights (high temperature side peak/low temperature side peak) is 0.65 or greater; and/or the ratio of the high temperature side crystallization peak area to the total area of the crystallization peaks [high temperature side peak area/(high temperature side peak area+low temperature side peak area)] is 0.18 or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.