Fluorofunctional statistical polymers with low glass transition temperature and method for obtaining same
CA 2447622 A1 · Owner: Boutevin, Bernard Leon · Inventors: Boutevin, Bernard Leon; Ameduri, Bruno Michel; Boucher, Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns fluorofunctional statistical polymers of formula (V¿1?) wherein: X, Y and Z represent a hydrogen atom and exhibiting in particular low glass transition temperatures obtained in particular from a monomer of formula I: F¿2?C=CF-R¿F?-SO¿2?F wherein: R¿F? represents one or several vinylidene fluoride units and/or a hexafluoropropene unit and/or a chlorotrifluoroerthylene unit. The crosslinkable fluorosulphonated elastomers thus obtained are advantageously usable for making membranes polymeric electrolytes, ionomers, membranes for fuel cells in particular hydrogen or methanol fuel cells for obtaining gaskets and O-rings, rubber hose pipes, pump bodies, diaphragms, piston …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 3, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2024.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.