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1. (WO2017032768) METHOD FOR PRODUCING HIGH MOLECULAR WEIGHT POLYOXYALKYLENE POLYOLS

Pub. No.:    WO/2017/032768    International Application No.:    PCT/EP2016/069878
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Wed Aug 24 01:59:59 CEST 2016
IPC: C08G 65/26
Applicants: COVESTRO DEUTSCHLAND AG
Inventors: LORENZ, Klaus
STEINLEIN, Christian
ZWICK, Horst
BODENMUELLER, Markus
ECKELMANN, Stephan
BAER, Friedhelm
Title: METHOD FOR PRODUCING HIGH MOLECULAR WEIGHT POLYOXYALKYLENE POLYOLS
Abstract:
The invention relates to an efficient method for producing polyoxyalkylene polyols with equivalent molar masses between 9500 and 23000 g/mol from one or more H-functional starter compounds, and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterised in that the alkylene oxide metering rate is reduced once a calculated equivalent molar mass of between 8000 and 9500 g/mol is reached.