PROCESS FOR PRODUCING POLYISOCYANATES OF THE DIPHENYL METHANE SERIES HAVING A REDUCED COLOR VALUE

Polyisocyanates of the diphenyl methane series having reduced color values are obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine, b) neutralizing the reaction mixture containing polyamine with a base, c) separating the neutralized mixture into t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Hagen, Torsten, Kamper, Friedhelm, Koch, Daniel, Uchdorf, Rudolf, Wershofen, Stefan
Format:	Patent
Sprache:	eng
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!