Process for the preparation of polyamines and their use for the production of polyurethanes
CA 1304411 C · Owner: Kopp, Richard · Inventors: Konig, Klaus; Ruckes, Andreas; Rasshofer, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-3021, PROCESS FOR THE PREPARATION OF POLYAMINES AND THEIR USE FOR THE PRODUCTION OF POLYURETHANES ABSTRACT OF THE DISCLOSURE, Polyamines are produced by hydrolyzing an isocyanate compound in the presence of at least one of a selected group of catalysts and a water miscible polar organic solvent in substantially homogeneous phase at 40-170°C. The catalyst employed is selected from potassium hydroxide, rubidium hydroxide cesium, hydroxide, potassium alcoholates rubidium alcoholates, cesium alcoholates potassium carboxylates, rubidium, carboxylates and cesium carboxylates. These polyamines are useful in the production of polyurethane(urea)s. Le A 24 819
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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 June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- 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.