METHOD FOR PRODUCING AQUEOUS POLYURETHANE DISPERSIONS BY MEANS OF FLASH EVAPORATION

The invention relates to a novel method for producing aqueous polyurethane dispersions from aqueous polyurethane dispersions or solutions containing solvents, by means of flash evaporation of the organic solvent or organic solvent mixtures. The invention also relates to a method for producing aqueou...

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Bibliographic Details
Main Authors ORSCHEL, MATTHIAS, SASSE, WOLFGANG
Format Patent
LanguageEnglish
French
German
Published 23.07.2008
Subjects
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Summary:The invention relates to a novel method for producing aqueous polyurethane dispersions from aqueous polyurethane dispersions or solutions containing solvents, by means of flash evaporation of the organic solvent or organic solvent mixtures. The invention also relates to a method for producing aqueous polyurethane dispersions by transforming hydrophilically modified NCO prepolymers or polyurethanes in an optionally aqueous organic solvent or solvent mixture into an aqueous dispersion or aqueous solution, and then removing the same from the organic solvent or solvent mixture.
Bibliography:Application Number: EP20050738063