Heterogeneous copolymer of vinylidene fluoride and chlorotrifluoroethylene process of preparation of the heterogeneous copolymer
US4946900A · kind A · utility
7Cited by
5References
6Claims
0Family size
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Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
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 chlorotrifluoroethylene are copolymerized, and in a second stage the polymerization of vinvylidene fluoride is continued after discontinuance of the introduction of chlorotrifluoroethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.