JPS6257178B

The present invention relates to a process for the preparation of carbonic acid esters of mono- or polyalcohols, which is characterized in that urethanes are reacted with monoalcohols or with polyalcohols in a molar ratio of alcohol to urethane group of at least 1 to 1, in the presence of a catalyst...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	PEETAA BOORU, BARUTAA HAITSU
Format:	Patent
Sprache:	eng
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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The present invention relates to a process for the preparation of carbonic acid esters of mono- or polyalcohols, which is characterized in that urethanes are reacted with monoalcohols or with polyalcohols in a molar ratio of alcohol to urethane group of at least 1 to 1, in the presence of a catalyst, at reaction temperatures of between 120 DEG C. and 270 DEG C. The present invention thus also relates to a process for the preparation of oligocarbonates and of polycarbonates, which is characterized in that monourethanes or bisurethanes are reacted with primary dialcohols in a molar ratio of about 1.5:1 to about 1:1.5, together with monoalcohols, in the presence of catalysts, at reaction temperatures of between 120 DEG C. and 270 DEG C.