Epoxidised modified acetophenone/formaldehyde resins
CA 1339695 C · Owner: Cotting, Jaques-Alain · Inventors: Cotting, Jaques-Alain; Renner, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyglycidyl ethers which are obtainable by reacting acetophenone with 0.7 to 1.4 mol of formaldehyde per mol of acetophenone in the presence, of an alkaline catalyst and in the temperature range from 50 to 100°C toa carbonylated acetophenone/formaldehyde resin hydrogenating said, carbonylated resin to a modified hydroxylated acetophenone/formaldehyde resin, subsequently converting said resin with epichlorohydrin in the, presence of a phase transfer catalyst into the corresponding, polychloro-hydrin ether and dehydrochlorinating said ether with a base are, suitable for use as epoxy resins, for example for the preparation of powder coating compositions having good resistance to chemicals 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
- Granted March 3, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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
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.