Basf Aktiengesellschaft

Basf Se Corporation

Basfaktiengesellschaft

Basf Schwarzheide Gmbh

Udo Rotermund

Renate Hempel

Holger Seifert

Werner Wiegmann

Marion Heinz

Ruediger Krech

Gottfried Knorr

Anja Biedermann

Manfred Genz

Michael Reichelt

Heinz Bollmann

Wolfgang Scholz

Klaus Hahn

Otto Volkert

Peter Falke

Eva Baum

Hermann Graf

Antje Ziemer

G&uuml;nter Mohrhardt

Peter Huntemann

Wolf-Dieter Habicher

Anne-Kathrin Merten

Michael Pcolinski

Werner Schmiade

Peter Von Malotki

Guiscard Gluck

Udo Schilling

Peter Böhme

Klaus Techritz

Peter Eberhardt

Norbert Krollmann

Peter Fritsch

The invention relates to isocyanate adducts which can be prepared by reacting at least one polyisocyanate with compounds having at least two hydrogen atoms which are reactive toward isocyanate groups and have a crystalline content of less than 10 J/g determined by differential scanning calorimetry in accordance with DIN 51 004 at 20 K/min from room temperature to 250&#xb0; C. using a nitrogen flow of 3 l/h as carrier gas and an aromatics content reported as carbon atoms in aromatic rings of less than 31% by weight, based on the total weight of the isocyanate adducts.

Isocyanate adducts

The invention relates to high-functionality polyether polyols of the general formula where each R'is an unsubstituted or substituted aliphatic or aromatic radical and each R&#x2032;is an unsubstituted or substituted aliphatic or aromatic radical, H, OH, polyalkyl ether chain or halogen, each X is a polyalkyl ether chain or H, where at least one X is a polyalkyl ether chain, and m is an integer from 0 to 20, where Xm is H when m is 0, and n is an integer from 4 to 12, to processes for preparing such high-functionality polyether polyols and also to the use thereof for preparing polyurethanes and nonionic surfactants.

High-functionality polyether polyols and preparation thereof

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

Diisocyanates containing hydantoin groups and polyurethanes in which they are present

Storage-stable, blowing agent-containing emulsions for producing rigid foams based on isocyanate

Microcellular urea-containing polyurethane elastomer

Rigid polyurethane foams having a low thermal conductivity are produced by reacting

Production of rigid polyurethane foams having a low thermal conductivity

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

Production of rigid polyurethanes foams with reduced density

Microcellular polyurethane elastomer containing urea groups

The present invention relates to thermal insulation gas mixtures comprising cyclopentane and argon for filling cavities.

Gas mixtures for thermal insulation

Blowing agent-containing emulsions comprise

Storage-stable emulsions for producing fine-celled rigid foams based on

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

Production of rigid polyurethane foams

In a process for producing open-celled rigid foams by reacting a) polyisocyanates with b) compounds containing hydrogen atoms which are reactive toward isocyanates, in the presence of c) water, d) if desired, organic compounds acting as physical blowing agents, e) catalysts, auxiliaries and/or additives, the compounds containing reactive hydrogen atoms used are substances having the structure I: ##STR1## where m is 0-15

Open-celled rigid foams based on isocyanate

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

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Ortrand, Germany

Udo Rotermund