Process for preparing tetrafluoroethylene/fluoro(alkyl vinyl ether) copolymer
US4499249A · kind A · utility
130Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1983 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Apr 28, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F214/262
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a tetrafluoroethylene/fluoro(alkyl vinyl ether) copolymer comprising polymerizing tetrafluoroethylene and fluoro(alkyl vinyl ether) in an aqueous suspension system which comprises a mixed medium of water and a fluorohydrocarbon or a chlorofluorohydrocarbon in a volume ratio of from 1:1 to 10:1 at a temperature of from 0.degree. to 25.degree. C. in the presence of a polymerization initiator of the formula: EQU [Cl(CF.sub.2).sub.n --COO].sub.2 (I) wherein n is an integer of 1 to 10, the copolymer obtained by the process having a small number of unstable terminal groups and excellent flex life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.