Binder composition for powder paints
CA 2110193 C · Owner: Molhoek, Leendert Jan · Inventors: Van Der Linde, Robert; Van Den Berg Jeths, Robert; Van De Werff, Adrianus Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A binder composition for thermosetting powder paints comprising (i) a polymer that is capable of reacting with epoxy groups and (ii) a crosslinker that contains epoxy groups, wherein the crosslinker comprises at least one C5 to C26 linear or branched aliphatic chain with the proviso that the epoxy groups are carried on at least one aliphatic chain. In order to function as a crosslinker the amount of oxirane-oxygen originating from said crosslinker in the binder composition is higher than 0.1 meq/gram. The crosslinker is, for example an, epoxidized oil, a modified epoxidized oil or an epoxidized alkyd resin. A powder paint comprising the binder composition can contain a suitable catalyst and …
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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 November 29, 1993 and granted February 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2015.
- 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.