POLYURETHANE DISPERSIONS OF LOW HARDNESS

The present invention relates to aqueous polyurethane dispersions comprising pentamethylene diisocyanate and to coatings obtainable therefrom. Said coatings, given a high density of urethane and urea groups, are softer than coatings that are obtained with polyurethane dispersions comprising other al...

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Bibliographische Detailangaben
Hauptverfasser:	FELLER, Thomas, GRABLOWITZ, Hans, Georg
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention relates to aqueous polyurethane dispersions comprising pentamethylene diisocyanate and to coatings obtainable therefrom. Said coatings, given a high density of urethane and urea groups, are softer than coatings that are obtained with polyurethane dispersions comprising other aliphatic diisocyanates, for example hexamethylene diisocyanate. La présente invention concerne des dispersions aqueuses de polyuréthane comprenant du diisocyanate de pentaméthylène (PDI) et des revêtements pouvant être obtenus à partir de celles-ci. La densité des groupes uréthane et urée dans ces revêtements étant élevée, ceux-ci sont plus souples que les revêtements obtenus avec des dispersions de polyuréthane comprenant d'autres diisocyanates aliphatiques, par exemple du diisocyanate d'hexaméthylène.