Basf Aktiengesellschaft

Basf Se Corporation

Hochschule Für Technik Und Wirtschaft Dresden

Kathrin Harre

Georg Heinrich Grosch

Thomas Ostrowski

Eva Baum

Stephan Bauer

Reinhard Lorenz

Dieter Junge

Raimund Ruppel

Inge Rotermund

J&ouml;rg Erbes

J&uuml;rgen Winkler

Berend Eling

Harald Larbig

Dirk Franke

Manfred Munzinger

Michael St&ouml;sser

Gerd H&ouml;ppner

Peter Zehner

Edward Michael Dexheimer

Edward Bohres

Stefan Dinsch

Jörg Erbes

Regina Pretzsch

Gerlinde Tischer

Michael Stösser

Michael Pcolinski

Elke Bleuel

Dieter St&uuml;tzer

J&ouml;rn M&uuml;ller

Peter De Vocht

Jürgen Winkler

Richard B Prager

Jeffery T Miller

Dirk Leys

Els Paredis

Process for producing flexible polyurethane foams in particular molded flexible polyurethane foams, by reacting

Method for producing polyrethane soft foam materials

The invention relates to a process for the continuous preparation of polyether alcohols by reaction of alkylene oxides with H-functional starter substances in the presence of DMC catalysts, which comprises, at the beginning of the process

Method for producing polyether alcohols

The invention relates to a process for producing flexible polyurethane foams, in particular molded flexible polyurethane foams, by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, wherein at least one polyether alcohol bi) which has been prepared by means of a DMC catalyst and has a hydroxyl number in the range from 15 to 35 mg KOH/g, and ethylene oxide content in the range from 5 to 18% by weight, based on the total weight of the polyether alcohol and an end block of ethylene oxide and propylene oxide having an ethylene oxide content of from 25 to 75% by weight, based on the amount of alkylene oxide in the end block, is used as compound b) having at least two hydrogen atoms which are reactive toward isocyanate groups.

Method for producing polyurethane-soft foam materials

The invention relates to polyether alcohols, to a process for preparing polyether alcohols by reacting alkylene oxides in the presence of a double metal cyanide (DMC) catalyst with at least one saturated OH component which may, if appropriate, have previously been reacted with an alkylene oxide, wherein an antioxidant is added before or during the reaction, and also to the further processing of the polyether alcohols to form polyurethanes.

Polyether alcohols and method for the production of polyether alcohols for polyurethane synthesis

Polyetherpolyols are prepared 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 by a process which is carried out in a vertical, highly cylindrical reactor having a central stirrer and having heat exchanger plates through which a heat-exchange medium flows and which are arranged essentially in the longitudinal direction of the reactor, at an angle &#x3b1; of from 0 to 70&#xb0; in the direction of rotation of the stirrer relative to the reactor radius.

Preparation of polyetherpolyols in the presence of a multimetal cyanide complex catalyst

A process for preparing polyether polyols includes a precipitation step, a recrystallization step, and a reaction step. In the precipitation step, a multimetal cyanide compound is precipitated by reaction of a metal salt with a cyanometalate compound. In the recrystallization step, the multimetal cyanide compound precipitated above is recrystallized by adding further metal salt and/or further cyanometalate compound. The recrystallization forms a multimetal cyanide catalyst compound. In the reaction step, an initiator and one or more alkylene oxide are reacted in the presence of the multimetal cyanide catalyst compound.

Process for preparing polyether polyols

In a process for producing polyurethanes by reacting at least one polyisocyanate with at least one compound containing at least two hydrogen atoms which are reactive toward isocyanate groups, the compound having at least two active hydrogen atoms which is used is at least one polyether alcohol prepared by addition of alkylene oxides onto H-functional initiator substances by means of multimetal cyanide catalysis and the reaction is carried out in the presence of at least one metal salt.

Method for the production of polyurethanes

In multimetal cyanide complexes, more than 30% by weight of the primary particles have a platelet-like habit, i.e. the length and width of the primary particles is at least three times the thickness of the particles.

Multimetal cyanide compounds, their preparation and their use

Suspension of multimetal cyanide compounds, their preparation and their use

Multimetal cyanide compounds

Polyester-polyether block copolymers can be prepared by catalytic addition of alkylene oxides onto H-functional initiator substances, using polyester alcohols as H-functional initiator substances and multimetal cyanide compounds as catalysts.

Polyester-polyether block copolymers

Method for producing multimetal cyanide compounds

Polyetherpolyols are prepared 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 by a process which is carried out in a vertical upright cylindrical reactor comprising a jet nozzle which is arranged in the upper reactor region and is directed downward and via which the starting materials and the reaction mixture are fed in, and comprising a take-off, preferably in the lower reactor region, via which the reaction mixture is fed back to the jet nozzle in an external circulation by means of a pump via an equilibration container, comprising a concentric guide tube which extends over the total length of the reactor, except for the reactor ends, and comprising a heat exchanger integrated in the annular space.

Method for producing polyetherpolyols in the presence of a multi-metal cyanide complex catalyst

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

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Dresden, Germany

Kathrin Harre