Heterogeneous copolymer of vinylidene fluoride and chlorotrifluoroethylene process of preparation of the heterogeneous copolymer
US4851479A · kind A · utility
8Cited by
6References
5Claims
0Family size
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Key dates
| Filing date | Jan 22, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jan 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F259/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Heterogeneous copolymers of vinylidene fluoride and chlorotrifluoroethylene are obtained by copolymerization in suspension or emulsion in two stages. In a first stage the vinylidene fluoride and the chlorotrifluroethylene are copolymerized, and in a second stage the polymerization of vinylidene fluoride is continued after discontinuance of the introduction of chlorotrifluoroethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.