Process for preparing telomers from ethylene and alpha, omega-dibromoperfluoroalkylalkanes in the presence of organic free-radical generators
US5254773A · kind A · utility
2Cited by
3References
18Claims
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Inventor
Key dates
| Filing date | Feb 26, 1993 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Feb 26, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/275
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed wherein a telomer having the formula BrCH.sub.2 CH.sub.2 (CF.sub.2 CFX).sub.n CH.sub.2 CH.sub.2 Br is prepared by reacting a telogen of the formula Br(CF.sub.2 CFX).sub.n CH.sub.2 CH.sub.2 Br with ethylene in the presence of an organic free-radical generator, wherein X is fluorine or a trifluoromethyl radical and n is an integer having a value of 1-5. It has been found that, when at least 0.05 mole of said free-radical generator is used for each mole of said telogen, the conversion of the telogen to the telomer is surprisingly increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.