Adhesive composition comprising a formaldehyde-containing aminoplast resin and a catalysing compound
CA 2533666 C · Owner: Oci Nitrogen B.V. · Inventors: De Haas, Jacob Leendert; De Keijzer, Augustinus Eugene Henk; Van Benthem, Rudolfus Antonius Theodorus Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an adhesive composition comprising a formaldehydecontaining aminoplast resin and a catalysing compound with the catalysing , compound being an acid or is able to release an acid with a pKa lower than 4 and with the formaldehyde-containing aminoplast resin having a F/(NH2)2 ratio lower than or equal to 1. The catalysing compound comprises at most 11 wt.% of an ammonium salt. The invention also relates to a process for the preparation of board material using the adhesive composition according to the invention and to the board material thus obtainable.
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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 27, 2004 and granted June 26, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2026.
- 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.