POLYISOCYANATE MIXTURE CONTAINING ISOCYANURATE GROUP AND URETEDIONE GROUP AND HAVING LOWERED COLOR NUMBER

The invention relates to a process for the preparation of isocyanurate and uretdione group-containing polyisocyanates of reduced colour number by catalytic oligomerisation of aliphatic and/or cycloaliphatic diisocyanates and removal of the unreacted monomeric diisocyanates, where the oligomerisation...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHIYUTEFUAN BUORUFU, GEERUHARUTO RAKUA, BERUNTO BURUFUMAN
Format:	Patent
Sprache:	eng
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 invention relates to a process for the preparation of isocyanurate and uretdione group-containing polyisocyanates of reduced colour number by catalytic oligomerisation of aliphatic and/or cycloaliphatic diisocyanates and removal of the unreacted monomeric diisocyanates, where the oligomerisation of the diisocyanates is carried out in accordance with the invention in the presence of up to 6000 ppm of carbon dioxide.