Basf Aktiengesellschaft

Basf Schwarzheide Gmbh

Basf Se Corporation

Basfaktiengesellschaft

Elastogran Gmbh

Basf Aktiengesellscaft

Basf Polyurethanes Gmbh

Holger Seifert

Berend Eling

Udo Rotermund

Renate Hempel

Gottfried Knorr

Peter Falke

Werner Wiegmann

Andreas Emge

Johann Klassen

Stefan Adams

Stefan Dinsch

Juergen Winkler

Regina Pretzsch

Robert O'Meara

Marion Heinz

Eva Baum

Daniel Freidank

Bernd Guettes

Michael Reichelt

Markus Schütte

Peter Von Malotki

Werner Schmiade

Christiane Giesker

Katrin Ebert

Jürgen Winkler

Gerd Höppner

Christian Stelling

Guenter Matzke

Louis Du Rieu

Vinit Chilekar

Günter Matzke

Bernd Zaschke

Peter Malotki

Sirus Zarbakhsh

Jan Rudloff

Frank Fechner

The invention relates to rigid polyurethane foams which can be produced by reacting

Rigid polyurethane foams

The invention relates to a process for producing rigid polyurethane foams by reacting

Method for the production of rigid polyurethane foam

Method for producing rigid polyurethane foams

Prepolymers which contain isocyanate groups, have an NCO content of at least 30.0% by weight and can be prepared by reacting an isocyanate mixture consisting predominantly of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates and having a proportion of two-ring isomers of not more than 74% by weight with at least 4-functional polyols or a mixture of polyols having a mean functionality of at least 4, where the polyols or polyol mixtures have a hydroxyl number of from 200 to 1650 mg KOH/g and a number average molecular weight of less than 1100 g/mol. The present invention also provides a process for preparing these prepolymers containing isocyanate groups, provides for their use for producing polyurethanes and provides a process for producing polyurethanes by reacting at least one novel prepolymer containing isocyanate groups, if desired in admixture with further organic and/or modified organic isocyanates (a), with compounds having at least two reactive hydrogen atoms (b) in the presence of, if desired, blowing agents (c), catalysts (d) and, if desired, further auxiliaries and/or additives (e).

Prepolymers containing isocyanate groups and a method for the production thereof

Thermally stable rigid foams based on isocyanate and having low brittleness and low thermal conductivity

Polyurethanes having improved curing are prepared by reacting

Preparation of polyurethanes having improved curing

A process for producing rigid polyurethane foams with reduced density by reacting

Production of rigid polyurethanes foams with reduced density

In a process for producing rigid polyurethane foams having improved heat distortion resistance and reduced thermal conductivity by reacting

Production of rigid polyurethane foams

A process for producing CFC-free polyurethane rigid foams having reduced thermal conductivity comprises reacting a) isocyanate semiprepolymers modified with urethane groups and containing from 31 to 20% by weight of NCO, based on aromatic polyisocyanates and at least one aromatic and/or preferably aliphatic polyester-polyol having a hydroxyl number of from 22 to 400, b) at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms, which advantageously have arylene units bonded to them, and, if desired, c) low molecular weight chain extenders and/or crosslinkers in the presence of d) blowing agents, preferably cyclopentane and/or cyclohexane in combination with water, e) catalysts and, if desired, f) additives. The CFC-free polyurethane rigid foams are preferably used as insulation material in refrigeration appliances and as insulation in composite and heating elements, for example for insulating remote heating pipes.

Production of CFC-free polyurethane rigid foams having a reduced thermal

In a process for producing rigid foams based on isocyanate, the blowing agent used is a mixture of at least one low-boiling hydrocarbon having from 3 to 7 carbon atoms, low molecular weight monohydric alcohols containing primary or secondary hydroxyl groups and having from 1 to 4 carbon atoms, and, if desired, the carbon dioxide formed from water and isocyanate. The rigid foams can be used as insulation material.

Production of rigid foams based on isocyanate

A process for producing CFC-free polyurethane rigid foams having reduced thermal conductivity comprises reacting

The invention relates to prepolymers containing isocyanate groups which can be prepared by reacting

Prepolymers containing isocyanate groups

The invention relates to polyurethane-based, compact moldings or moldings having a cellular core and a compacted surface which comprise crosslinked poly(meth)acrylic acid, poly(meth)acrylic acid salts and/or poly(meth)acrylamides, to a process for their production, and to their use as shoe or shoe sole material.

Polyurethane-based, compact moldings or moldings having a cellular core

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Freital, Germany

Holger Seifert