Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Diana Engelen

Stefan Lindner

Reinhard Strey

Wolfgang Friederichs

Thomas Sottmann

Agnes Dominika Chalbi

Meike Niesten

Paul Heinz

Elena Khazova

Niels Becker

Nils Becker

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

Growing community of inventors

Leverkusen, Germany

Diana Engelen