Covestro Deutschland Ag

Bayer Materialscience Ag

UniversitÄt Zu Koln

Bayer Intellectual Property Gmbh

Forschungszentrum Julich Gmbh

Stahl International B.v.

Thomas Sottmann

Günter Oetter

Stefan Lindner

Günter Scherr

Reinhard Strey

Wolfgang Friederichs

Elena Khazova

Verena Dahl

Diana Engelen

Lorenz Kramer

Meike Niesten

Gunther Pabst

Paul Heinz

Rainer Erhardt

Agnes Dominika Chalbi

Britta Jakobs

Lutz Willner

Dieter Richter

Philippe Lamalle

Jürgen Allgaier

Axel Nawrath

Michael Schwan

Niels Becker

Nils Becker

Thomas FÜNGERLINGS

Sandra Engelskirchen

A polyurethane foam, polyisocyanurate foam or polyurea foam is obtainable from the reaction of a mixture comprising A) a compound reactive towards isocyanate ('NCO-reactive compound'); B) a blowing agent selected from the group comprising linear, branched or cyclic C1 to C6 hydrocarbons, linear,branched or cyclic C1 to C6 fluorocarbons, N, O, argon and/or CO, where the blowing agent B) is present in the supercritical or near-critical state; C) a polyisocyanate; D) an amphiphilic isocyanate; and E) optionally a surfactant and F) optionally other auxiliaries and additives. The invention further relates to the production of this polyurethane foam, where the blowing agent is emulsified in the isocyanate component containing amphiphilic isocyanate.

Polyurethane foam and process for producing same

The present invention relates to a process for producing a foamed material, wherein a composition in the form of emulsion with a matrix-forming component, a surfactant component and a near-critical or supercritical blowing agent component is submitted to a lowering of pressure. The blowing agent component further comprises a hydrophobic co-component, which is soluble in supercritical COat a pressure of &#x2267;150 bar, is insoluble in subcritical COat a pressure of &#x2266;40 bar and is insoluble in the matrix-forming component and furthermore is present in a proportion from &#x2267;3 wt % to &#x2266;35 wt % of the blowing agent component. It further relates to a composition in the form of emulsion to be used herein and a foamed material obtainable by the process according to the invention.

Process for producing a foamed material,composition in the form of emulsion used therein and foamed material obtainable therefrom

The present invention relates to a process for producing a polyurethane foam, where the blowing agent used is present in the supercritical or near-critical state. A reaction mixture is introduced into a closed mould, where the closed mould has been set up in such a way that its interior volume and/or the pressure prevailing in its interior can be altered after the introduction of the mixture by external influence. Through the selection of the surfactant it is possible to obtain microemulsions of the blowing agent in the polyol phase. The invention further relates to a nanocellular polyurethane foam obtainable by the process of the invention.

Process for producing a polyurethane foam by means of supercritical or near-critical blowing agent

Process for producing a polyurethane foam and polyurethane foam obtainable therefrom A process for producing a polyurethane foam with bimodal cell size distribution, comprising the following steps:

Process for producing a polyurethane foam and polyurethane foam obtainable therefrom

The invention relates to bicontinuous microemulsions and to the use thereof as a fuel, combustion or heating fluid. Said fuels permit an increased efficiency of internal combustion systems and heating installations of any type and, simultaneously, a minimized emission of pollutants, associated with combustion, to be obtained.

Microemulsions and use thereof as a fuel

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Kö'ln, Germany

Thomas Sottmann