Process for the preparation of n,o-substituted mono- and/or polyurethanes
CA 1249596 A · Owner: Basf Aktiengesellschaft · Inventors: Towae, Friedrich; Merger, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR THE PREPARATION OF, N,o-SUBSTITUTED MONO- AND/OR POLYURETHANES Abstract of the Disclosure, The invention describes a process for the preparation of N,o-substituted mono- and/or polyurethanes of formula, R1-NHCOOR2n, in which, R1 is an aliphatic cycloaliphatic, aromatic, araliphatic, or heterocyclic radical which may be substituted, R2 is an aliphatic cycloaliphatic, or araliphatic radical which may be substituted with alkoxy or polyoxyalkylene groups, and, n is a whole number from 1 to 5 through the reaction of N-substituted allophanates and/or polyallophanates with alcohols R2OH in the presence or absence of catalysts at temperatures of at least 160°C preferably from 165° to …
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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 January 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 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
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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.