Other

Bayer Aktiengesellschaft

Bert Klesczewski

J&ouml;rg Hofmann

Bernd Klinksiek

Jose F Pazos

Christian Steinlein

Stephan Ehlers

Lars Obendorf

Harald Pielartzik

Pramod Gupta

The present invention relates to a process for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds containing active hydrogen atoms conducted in the presence of a double-metal cyanide catalyst wherein a reaction mixture is guided at least once through a zone which has an energy density of at least 10 J/m and wherein the residence time of the reaction mixture in this zone is at least 10 seconds per pass.

Process for the preparation of polyether polyols

The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5&times;10 J/m , wherein the dwell time of the reaction mixture in this zone is at least 10 seconds per pass.

Process for producing polyether polyols

Open-cell rigid foams containing urethane and/or isocyanurate and/or urea groups are produced with a long-chain polyether polyol having low double bond content.

Open-cell rigid polyurethane foams

Growing community of inventors

Düsseldorf, Germany

Bert Klesczewski