Process for the production of blocked compounds optionally containing free hydroxyl groups and their use for the production of polyurethanes
CA 1204762 A · Owner: Bayer Aktiengesellschaft · Inventors: Traenckner, Hans-Joachim; Findeisen, Kurt; Beer, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the production of compounds containing reversibly blocked and, optionally, free alcoholic hydroxyl groups, characterized in that organic compounds containing at least one alcoholic hydroxyl group but, otherwise being inert under the reaction conditions are reacted at 0 to 140°C with N,N'-disubstituted 5-acylimino-imidazolidine diones corresponding to the following general formula, The present invention also relates to the use of these compounds for the production of polyurethanes. This is accomplished by mixing the compounds prepared in accordance with the present invention with polyisocyanates and heating the mixture to an elevated temperature …
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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 May 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
- 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.