PROCESS FOR PRODUCING POLYISOCYANATES CONTAINING IMINOOXADIAZINEDIONE GROUPS AND USE OF THESE

PROCESS FOR PRODUCING POLYISOCYANATES CONTAINING IMINOOXADIAZINEDIONE GROUPS AND USE OF THESE

The present invention relates to a method for producing polyisocyanates comprising iminooxadiazinedione groups, wherein at least one monomeric di- and/or tri-isocyanate is oligomerised in the presence of a) at least one catalyst, b) at least one additive (A) having a relative permittivity at 18° C....

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RICHTER, FRANK, HALPAAP, REINHARD
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
HETEROCYCLIC COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:The present invention relates to a method for producing polyisocyanates comprising iminooxadiazinedione groups, wherein at least one monomeric di- and/or tri-isocyanate is oligomerised in the presence of a) at least one catalyst, b) at least one additive (A) having a relative permittivity at 18° C. to 30° C. of less than 4.0, c) optionally further additives other than A. The invention relates further to a reaction system for producing polyisocyanates comprising iminooxadiazinedione groups, and to the use of an additive (A) having a relative permittivity at 18° C. to 30° C. of less than 4.0 for producing polyisocyanates comprising iminooxadiazinedione groups by catalysed modification of monomeric di- and/or tri-isocyanates.