Fluoroelastomers substantially free from polar terminals and related preparation process
US5852149A · kind A · utility
9Cited by
17References
18Claims
0Family size
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Key dates
| Filing date | Aug 4, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Aug 4, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F214/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fluoroelastomers substantially free from polar end groups, comprising vinylidene fluoride (VDF) and/or tetrafluoroethylene (TFE) and at least another fluorinated ethylenically unsaturated monomer. They are characterized by an high thermal stability, an optimal processability and curing easiness, without giving rise to pre-crosslinking phenomena and moreover they do not require prolonged post-curing treatments. Such flurooelastomers are advantageously prepared by copolymerization of the corresponding monomers in aqueous emulsion in the presence of ultraviolet-visible radiation (UV-VIS) and of an organic peroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.