Process for the production of uretdione group-containing compounds, the compounds obtained according to this process and the use thereof in the production of polyurethane plastics material
CA 1279325 C · Owner: Bayer Aktiengesellschaft · Inventors: Kubitza, Werner; Frohlich, Jurg; Engbert, Theodor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a process for the production of uretdione group-containing compounds by dimerizing at least a part of the isocyanate groups of organic isocyanates in the presence of compounds containing phosphorus-nitrogen bonds as dimerization catalysts, characterized in that the reaction is carried out in the presence, as co-catalysts, of H-active organic compounds having a pKa-value of at least 6 which have at least one hydrogen atom bound to oxygen sulphur or nitrogen. The invention also relates to the uretdione group-containing compounds obtained according to this process and to their use for the production of plastics materials according to the isocyanate-polyaddition …
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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 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.