Tetrafluoroethylene thermoprocessable copolymers
US6066707A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1997 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | May 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F214/262
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Tetrafluoroethylene (TFE) thermoprocessable copolymers, consisting of: PA1 (A) from 0.1 to 15% by moles of a fluorodioxol of formula ##STR1## wherein R.sub.F is a perfluoroalkyl having from 1 to 5 carbon atoms; X.sub.1 and X.sub.2, equal to or different from each other, are --F or --CF.sub.3 ; Z is selected from --F, --H and --Cl; PA1 (B) from 0 to 15% by moles of a perfluorinated monomer selected from hexafluoropropene (HFP) and a perfluoralkylvinylether of formula CF.sub.2 .dbd.CF--OR'.sub.f wherein R'.sub.f is a perfluoroalkyl C.sub.2 -C.sub.4 or their mixtures; excluding the value 0 for the amount of the monomer (B); and PA1 (C) TFE forming the remaining part to 100%; with the proviso that the total amount of the monomers (A) and (B) is lower than or equal to 20% by mole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.