Polyurethane compositions containing polyaldimine
CA 2493600 A1 · Owner: Burckhardt, Urs · Inventors: Burckhardt, Urs
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to compositions containing at least one polyurethane prepolymer A which has isocyanate end groups and is produced from at least one polyisocyanate and at least one polyol and at least one polyaldimine B which can be obtained from at least one polyamine C having aliphatic primary amino groups and at least one aldehyde D. The invention also relates to the production of said compositions, and to the production of the polyaldimine. Disclosed is also the use of said compositions as an adhesive a sealant, a , coating or a lining. The invention further relates to methods for gluing sealing or coating, and to articles having a surface which has been at least partially …
Read the whole patent
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 23, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.