Basf Aktiengesellschaft

Basf Schwarzheide Gmbh

Bernd Guettes

Stefan Dinsch

Juergen Winkler

Regina Pretzsch

Gerd Hoeppner

Karl-Heinz Steinchen

Ulrike Licht

Heinz-Dieter Lutter

Knut Oppenlander

Heinz Auer

Holger Seifert

Werner Hinz

Uwe Keppeler

Peter Weyland

Gabriele Dralle-Voss

Harald Larbig

Rolf Henn

Michael Zirnstein

Klaus Wagner

Karl Haberle

Gottfried Knorr

Jurgen Reichert

Gerlinde Tischer

Kuno Beutler

Gerd Mueller-Hagen

Baerbel Meyer

Monika Wetterling

Jens Bruhn

Nicholas Kokel

Ralf Fritz

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

Polyurethanes having improved curing are prepared by reacting

Preparation of polyurethanes having improved curing

In a process for producing flexible polyurethane foams by reacting

Production of flexible polyurethane foams

In a process for preparing polyether polyols containing aromatics by molecular addition of alkylene oxides to H-functional initiators at from 70.degree. C. to 135.degree. C. and pressures of from 0.1 MPa to 1.0 MPa, the alkoxylation is carried out using at least one initiator comprising at least 95% by weight of 2,3 and 3,4 isomers of tolylenediamine, from 0.5 to 4% by weight of 2,4 and 2,6 isomers of tolylenediamine and from 0.1 to 1.5% by weight of more volatile fractions from tolylenediamine production. The polyether polyols prepared by this process can be used as component of a polyol mixture for producing rigid polyurethane foams.

Preparation of polyether polyols containing aromatics

Aqueous dispersions containing a polyurethane built up from

Aqueous polyurethane dispersions containing structural units derived

Polymeric polyesterols are prepared by in-situ polymerization of ethylenically unsaturated monomers in polyesterols in the presence of prepolymers made from polyesterols and isocyanates.

Preparation of polymeric polyesterols

The invention relates to a process for the preparation of bromine-containing polyols in which a bromine-containing alcohol is caused to react with an alkylene oxide in admixture with other H-functional compounds and the catalyst used is a system comprising alkaline and Lewis-acid catalysts.

Preparation of bromine-containing polyols

A process for the production of rigid polyurethane foams involves reacting

Production of rigid polyurethane foams

Growing community of inventors

Sallgast, Germany

Bernd Guettes