Aqueous polyurethane dispersions which can be hardened with uv-radiation and thermally, and use thereof
CA 2386222 A1 · Owner: Basf Aktiengesellschaft · Inventors: Vollinger, Frank; Schrof, Wolfgang; Bruchmann, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to aqueous polyurethane dispersions which can be hardened with UV radiation and thermally. Said polyurethane dispersions contain the following: compounds bonded with polyisocyanates with C=C double , bonds that can be polymerised with UV-radiation; aliphatic diols inserted with isocyanates, with a molecular weight of less than 500 g/mol; compounds bonded with isocyanates, with carboxylic acid or sulphonic acid groups and/or salts thereof, free hydroxyl groups and compounds with blocked isocyanate groups. The inventive polyurethane dispersions are suitable for coating thermostable substrates such as metal substrates and can be advantageously used for clear …
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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 September 29, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2022.
- 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
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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.