Polyurethane-based anhydrous sizing composition for glass fibres, glass fibres thus obtained and composite materials comprising said fibres
CA 2486479 A1 · Owner: Pousse, Christelle · Inventors: Moireau, Patrick; Pousse, Christelle
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a sizing composition consisting of a solution comprising less than 5 wt.- % solvent and a polymerisable base system said system containing at least 50 wt.- % components of a mixture of: component(s) having at least one isocyanate-reactive function; component(s) having at least one hydroxy-reactive function; and optionally, component(s) having at least one amine-reactive function. The invention also relates to glass fibres which are covered with the aforementioned sizing composition. The glass fibres thus obtained can be used to reinforce organic or inorganic materials.
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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 May 21, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 21, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2025.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.