Bicyclic amide acetals are prepared from organic nitriles and dialkanol amines at below about 140 c and product is isolated by solvent extraction
CA 1283415 C · Owner: Goel, Anil B. · Inventors: Goel, Anil B.; Richards, Harvey J.
Overview
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Open the CIPO recordAbstract From the Canadian patent
An improved process as described for preparing bicyclic amide acetals from an organic nitrile and a dialkanol amine wherein the reaction temperature is maintained in the range of from room temperature to 140°C. The resulting bicyclic amide acetal product is removed from the reaction mixture by extraction into a hydrocarbon or organic nitrile solvent prior to its purification. These acetals were found to be particularly suitable as chemical intermediates in the preparation of polyurethanes, epoxy resins and the like.
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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 April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 2008.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.