Bayer Aktiengesellschaft

Bsyer Aktiengesellschaft

Bayer Materialscience Ag

Pramod Gupta

J&ouml;rg Hofmann

Pieter Ooms

Walter Sch&auml;fer

Manfred Dietrich

Herbert Gebauer

Jörg Hofmann

Harald Pielartzik

Christian Konig

Hans-Joachim Sandhagen

Rolf Wiedermann

Gundolf Jacobs

Hartmut Hetzel

Hans-Wilhelm Engels

Hansjurgen Rabe

Roland Nast

Uwe Denninger

Joel Leuridan

Walter Schäfer

John Lohrenz

Robert-Joseph Kumpf

Martin Hoppe

Hans-Josef Buysch

Wolfgang Fischer

Walter Schafer

Jurgen Meixner

Christian Rasp

Karl-Heinz Hentschel

Hans Muller

Wilfried Nolte

Hanns-Peter M&uuml;ller

Christian Steinlein

Siegfried Kussi

Gerhard Heilig

Stephan Ehlers

Dittmar Nerger

Horst Zwick

Chiraranjan Podder

Michael Schneider

Erwin Windemuth

Gerhard Henes

Joachim Zirner

Bert Klesczewski

Werner Betz

Ulrich Leyrer

Hansjürgen Rabe

Herbert Echterhof

Ulrich Brocker

Heinz-Jorg Rosenbaum

Hans-Jurgen Rabe

Jürgen Grönen

Lambertus Groenendaal

The invention provides new double metal cyanide (DMC) catalysts for preparing polyetherpolyols by the polyaddition of alkylene oxides to starter compounds which contain active hydrogen atoms, wherein the catalyst comprises a) double metal cyanide compounds, b) bile acids or their salts, esters or amides and c) organic complex ligands. The catalysts according to the invention show greatly increased activity during preparation of a polyetherpolyol.

Double metal cyanide catalysts for producing polyether polyols

The invention relates to novel double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands other than c), and c) complex ligands formed by introduction of a glycidyl ether into the catalyst. The catalysts according to the invention have greatly increased activity in the preparation of polyether polyols.

Bimetallic-cyanide catalysts used for preparing polyether polyols

Flexible polyurethane foams are produced from a polyisocyanate and a polyether polyol which has been alkoxylated in the presence of a double metal cyanide catalyst and that has at least one ethylene oxide-propylene oxide mixed block.

High-resilient polyurethane foams produced from polyether polyols

Double-metal cyanide catalysts containing polyester for preparing polyether polyols

The present invention relates to a process for the preparation of polyether polyols by the reaction of alkylene oxides and compounds containing active hydrogens, in the presence of specific Lewis acid metal compounds as catalysts, novel bis(perfluoroalkylsulfonic acid) compounds of Group 13 of the Periodic Table of the Elements, and to a process for the preparation thereof and the use thereof as catalysts for ring-opening polymerization of cyclic ethers.

Process for the preparation of polyether polyols

The invention relates to long-chain polyether polyols having a content of primary OH groups of 40 to 95 mol-% and a total content of oxyethylene units of >25 wt. % as well as a process for their production by DMC-catalysed polyaddition of an ethylene oxide (EO)/propylene oxide (PO) mixture in the weight ratio of 40:60 to 95:5 as an end block to starter compounds having active hydrogen atoms.

Long-chain polyether polyols with a high proportion of primary oh groups

The invention relates to novel double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands other than c), and c) carboxylic acid ester of polyhydric alcohols. The catalysts according to the invention have greatly increased activity in the preparation of polyether polyols.

Double-metal cyanide catalysts for producing polyether polyols

This invention relates to novel double metal cyanide (DMC) catalysts for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds having active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands other than c) and c) ionic surface- or interface-active compounds. The catalysts according to the invention have greatly increased activity in the production of polyether polyols.

This invention relates to crystallizing polyether polyols which can be produced firstly by the reaction of propylene oxide and polyhydroxy compounds in the presence of an alkoxy compound which contains zinc and/or aluminium atoms to form a crystallizing polyether polyol with an average molecular weight M from 500 to 5000, followed by the further reaction of the crystallizing polyether polyol which is thus obtained with 10 to 90% by weight, with respect to the amount of crystallizing polyol, of an epoxide in the presence of a catalyst which does not polymerize propylene oxide stereospecifically, to form a crystallizing polyether polyol with an average molecular weight M from 1000 to 20,000. The invention further relates to a method for the production thereof and to the use thereof for the production of polyurethane materials, particularly polyurethane foams, polyurethane elastomers and polyurethane coatings.

Crystallizing polyether polyols, a method for producing them and use of the same

The invention relates to new double metal cyanide (DMC) catalysts for the production of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands different from c), and c) &agr;,&bgr;-unsaturated carboxylic acid esters. The catalysts according to the invention have a significantly improved activity in the production of polyether polyols.

Double metal cyanide catalysts for the production of polyther polyols

The invention relates to a process for the preparation of polyether polyols by means of double metal cyanide (DMC) catalysts, in which the induction phase is shortened markedly. By continuous dispensing of an alkylene oxide into the starter-catalyst mixture it is possible to achieve a substantial shortening of the induction phase by comparison with the batch-wise activation.

Method for preparing polyether polyols

This invention relates to a process for the production of long-chain polyether polyols without working up, in which oligomeric, alkoxylated starter compounds having molecular weights of 200 to 1000 are first obtained by catalysis with perfluoroalkylsulfonates of the metals of group III A of the periodic system of elements (in accordance with the IUPAC convention of 1970) from low molecular weight starters by reaction with alkylene oxides at reaction temperatures of 80 to 200&deg; C. and catalyst concentrations of 5 to 200 ppm, which oligomeric, alkoxylated starter compounds are then converted without working up and removal of the catalyst by means of highly active DMC catalysts at a catalyst concentration of 30 ppm or below, relative to the quantity of polyether polyol to be produced, by reaction with alkylene oxides into higher molecular weight, long-chain polyether polyols.

Method for producing long chain polyether polyols without reprocessing

This invention relates to new double metal cyanide (DMC) catalysts, a process for the preparation of these DMC catalysts, and to a process for the production of polyether polyols by the polyaddition of alkylene oxides to starter compounds which comprise active hydrogen atoms, wherein the catalyst comprises a) one or more double metal cyanide compounds, b) one or more organic complexing ligands, and c) one or more organic phosphates, organic phosphites, organic phosphonates, organic phosphonites, organic phosphinates or organic phosphinites. The catalysts according to the invention exhibit a considerably increased activity for polyether polyol production.

Double metal cyanide catalysts for the preparation of polyether polyols

The present invention relates to a process for the preparation of novel, partially crystalline polyether polyols with a functionality of &gE;2, an average molecular weight M of 500 to 100,000 and a molar proportion of isotactic triads determining the crystallinity of >28%. The new polyether polyols are prepared by polymerizing alkylene oxides in the presence of a bimetallic :-oxoalkoxide modified with hydroxyl compounds.

Method for producing partially crystalline polyether polyols

Growing community of inventors

Bedburg, Germany

Pramod Gupta