Method of converting fluorine-containing high polymer into lower molecular weight polymer
US4711949A · kind A · utility
5Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Nov 13, 1985 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Nov 13, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A fluorine-containing high polymer, e.g. polytetrafluoroethylene, can easily and efficiently be converted into a wax-like lower molecular weight polymer by contact reaction of the high polymer with a gas comprising a fluorinating agent, which is selected from molecular fluorine, nitrogen-fluorine compounds represented by NF.sub.3, halogen fluorides represented by ClF.sub.3 and fluorides of rare gas elements represented by XeF.sub.2, at a temperature in the range from 250.degree. to 550.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.