PREPARATION OF POLYISOCYANATES CONTAINING IMINOOXADIAZINEDIONE GROUPS AND THEIR USE

PREPARATION OF POLYISOCYANATES CONTAINING IMINOOXADIAZINEDIONE GROUPS AND THEIR USE

A process for the preparation of polyisocyanates containing iminooxadiazinedione groups, comprising reacting at least one (cyclo)aliphatic diisocyanate in the presence of at least one oligomerization catalyst, and when the reaction has reached a predeterminable degree of con-version, based on the (c...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FREDERIC, Lucas, VELING, Nico, SCHEIDEL, Jens, SCHAEFER, Harald, HEINEN, Kerstin, GENGER, Thomas
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:A process for the preparation of polyisocyanates containing iminooxadiazinedione groups, comprising reacting at least one (cyclo)aliphatic diisocyanate in the presence of at least one oligomerization catalyst, and when the reaction has reached a predeterminable degree of con-version, based on the (cyclo)aliphatic diisocyanates, stopping the reaction by addition of at least one catalyst poison for the oligomerization catalyst, wherein the oligomerization catalyst is a salt containing a fluoride or poly(hydrogen)fluoride [F- x (HF)m] as anion and the catalyst poison is a solution containing at least one alcohol comprising at least 6 carbon atoms as solventand wherein m is a number between 0.01 and 20.