Method for the production of amino resin
CA 1315446 C · Owner: Dynobel A/S · Inventors: Gabrielsson, Per Erik Georg; Flodman, Leif Algot
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 method for the production of a resin which is used for manufacturing of an adhesive for cellulose based products, According to the method 30- 70 % by weight of a urea phenol resin with a molar ratio of 1.4 - 0.6 moles of urea, 0.006 - 0.3 moles of phenol and 0 - 0.04 moles of melamine per mole formaldehyde are mixed, with 70 - 30 % by weight of a melamine resin with a molar ratio formaldehyde : melamine of 1.7 - 2.4. The urea-phenol resin has been prepared by adding a cross-linking agent containing a co-condensate of phenol, formaldehyde and urea to a pre-condensate of formaldehyde, urea and optionally melamine and condensing under acid conditions. According to a …
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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
- Granted March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 2010.
- 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.