Basf Aktiengesellschaft

Gerd Hoeppner

Harald Larbig

Bernd Guettes

Stefan Dinsch

Georg Heinrich Grosch

Heinz-Dieter Lutter

Heinz Auer

Klaus Wagner

Dieter Junge

Juergen Winkler

Monika Wetterling

Peter De Vocht

Karl-Heinz Steinchen

Daniella Geelen

Jens Bruhn

A process for preparing double metal cyanide catalysts, comprising combining an aqueous solution of a metal salt of the formula M,(X),, with an aqueous solution of a cyanometallic acid of the formula H,M,(CN),(A),, where one or both aqueous solutions may comprises at least one water-miscible organic ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitrites or sulfides, if desired, combining the aqueous suspension thus obtained with at least one water-miscible organic ligand selected from the above-mentioned group, which ligand may be identical to or different from any previously added ligand, and separating the resulting two-metal cyanide complex from the suspension.

Process for preparing two-metal cyanide catalysts

A process for treating polyether polyols prepared in a conventional manner by base-catalyzed reaction of H-functional initiator substances with alkylene oxides comprises a combination of a thermal-reactive step at a pH of less than 7 and a temperature above 60&deg; C. and a thermal-distillative step in a countercurrent column using a purifying agent. The polyether polyols prepared according to the invention are used for producing low-fogging and low-odor PUR foams.

Treatment for polyether polyols

In a process for producing flexible polyurethane foams by reacting

Production of flexible polyurethane foams

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Schwarzheide, Germany

Gerd Hoeppner