Basf Aktiengesellschaft

Basfaktiengesellschaft

Gerd H&ouml;ppner

J&uuml;rgen Winkler

Georg Heinrich Grosch

Stephan Bauer

Kathrin Harre

Thomas Ostrowski

Reinhard Lorenz

Michael Reichelt

Stefan Dinsch

Inge Rotermund

Gottfried Knorr

Peter Von Malotki

Peter De Vocht

Dirk Leys

Els Paredis

A process for the preparation of polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst is proposed, the reaction being carried out in a stirred kettle reactor and the reaction mixture being circulated via an external heat exchanger by means of a pump.

Method of producing polyetherpolyols

In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.

Method for production of polyether alcohols

Polyetherols based on solid initiator substances and liquid, hydroxyl-containing coinitiators are prepared by a catalyzed addition reaction of alkylene oxides by a process in which the initiator combination contains diols carrying ethoxy structures, the ratio of the average number of hydroxyl groups per mole of initiator combination to the number of ethoxy structures in the polyetherol being from 1:0.2 to 1:1.8 and the ratio of the amounts by weight of the diols carrying ethoxy structures to the average molecular weight of the polyetherol being from 1:2 to 1:15. The polyetherols prepared by this process are used for the preparation of PUR, in particular, rigid PUR foams.

Preparation of polyetherols

Growing community of inventors

Schwarzheide, Germany

Gerd Höppner

Growing community of inventors

Schwarzheide, Germany

Gerd H&ouml;ppner

Gerd Höppner