Curable resin compositions useful as hot-melt adhesives
CA 2065185 A1 · Owner: Frihart, Charles R. · Inventors: Frihart, Charles R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resin composition is described which comprises: - a thermoplastic, substantially amine-terminated polyamide resin having an amine plus acid number between about 1 and about 50 and having an excess of free amine to acid groups;, - a reactive diluent containing a polar group; and - an epoxy resin having at least two epoxy groups per molecule of epoxy resin;, wherein the initial ratio of the epoxy groups to free amine groups is between about 1:1 and about 10:1. The diluent serves to reduce the viscosity of said polyamide resin without adversely affecting the strength of the resin composition. A process for the preparation of the resin compositions is described. The compositions of the …
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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 April 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2014.
- 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.