2,3,3,3-tetrafluoro-1-propene as diluent for the preparation of novel butyl rubbers
US10011670B2 · kind B2 · utility
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6References
20Claims
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Key dates
| Filing date | Apr 30, 2015 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Apr 30, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to an efficient polymerization process and its use to produce novel copolymers with a specific micro structure. In particular, the invention relates to butyl rubbers with novel micro structure, preferably those obtainable by copolymerization of monomer mixtures comprising isobutylene and isoprene in diluents comprising 2,3,3,3 -tetrafluoro-1-propene. In a further aspect the invention relates to halogenated copolymers obtainable from such novel copolymers by halogenation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.