Process for producing methylol ketones
CA 1256120 A · Owner: Clark Chemical Corporation · Inventors: Henderson, James T.; Warnes, Paul R.; Leja, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methylol ketones are produced by reacting a ketone with an aldehyde in the presence of a tertiary amine catalyst. The resulting polyols undergo the reactions common to beta hydroxy ketones, specifically, condensation reactions and substitution reactions involving the hydroxyl functionality; and addition reactions involving the carbonyl group. Each polyol molecule of the invention has from one to six hydroxyl groups in the beta position relative to the carbonyl group. The polyols are further characterized by complete water solubility and compatibility with a wide range of polymers, rendering these polyols useful as extenders and co-reactants.
Read the whole patent
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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.