PROCESS FOR PREPARING CARBODIIMIDES

The invention relates to a novel process for preparing carbodiimides comprising the steps ofa) carbodiimidization of isocyanates in the presence of a catalyst,b) separation of the catalyst and/or monomeric isocyanate from the carbodiimide by distillation or extraction to obtain a crude carbodiimide...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	LAUFER, Wilhelm
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON 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 novel process for preparing carbodiimides comprising the steps ofa) carbodiimidization of isocyanates in the presence of a catalyst,b) separation of the catalyst and/or monomeric isocyanate from the carbodiimide by distillation or extraction to obtain a crude carbodiimide comprising monomeric isocyanate,c) addition of one or more alcohols and partial or complete reaction of the alcohol with the monomeric isocyanate of the crude carbodiimide.