Method for stabilizing fluorocopolymers
US6846904B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Jan 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
After a melt-processable fluorine-containing copolymer is heated and molten, the copolymer is reheatd in a closed apparatus under a non-static condition at a temperature of, for example, 130° C. to the melting point of the fluorine-containing polymer, whereby a content of volatile materials in the copolymer is reduced to 30% or less of an initial content of volatile materials. Thereby, the content of volatile materials in the melt-processable fluorine-containing copolymer, which has been once molten, can be effectively decreased without using a large apparatus while avoiding the contamination of the copolymer with foreign particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.