Epoxy functional polyester resins having an increased molecular weight, process for their preparation, and outdoor durable coating compositions comprising them
CA 2350130 A1 · Owner: Li, Simon Ming-Kung · Inventors: Kooijmans, Petrus Gerardus; Li, Simon Ming-Kung; Marx, Edward John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Epoxy functional polyester resins (I), which are storage stable at temperatures up to 40 ~C and have a Tg of more than 40 ~C and which are , obtainable by a process comprising the reaction of an epoxy functional polyester resin (II) obtainable by the reaction of epihalohydrin in the presence of a base with carboxyl functional polyester resins (III) obtainable by reacting: (a) at least one aromatic or cycloaliphatic dicarboxylic acid compound A comprising two aromatic- or secondary aliphatic carboxyl groups or the anhydride thereof; (b) at least one diol compound B comprising two aliphatic hydroxyl groups, which may independently be a primary or a secondary hydroxyl group; 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 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2021.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.