Aqueous coating

An aqueous coating composition comprises polycarbonate polyols (A2) and a polyurethane chain extended with compounds (D1), which are dysfunctional with respect to isocyanates. The polyurethane comprises building blocks of hydroxy acids (C1) and urethane groups derived from polyfunctional isocyanates...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SCHAEUTLE, MARKUS, GLETTLER, MARTINA, WANGO, JOERG, BURKL, JULIUS, PETRITSCH, GERLINDE, ARZT, ANTON
Format:	Patent
Sprache:	eng ; fre ; ger
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:	An aqueous coating composition comprises polycarbonate polyols (A2) and a polyurethane chain extended with compounds (D1), which are dysfunctional with respect to isocyanates. The polyurethane comprises building blocks of hydroxy acids (C1) and urethane groups derived from polyfunctional isocyanates (B1). The polyurethane containing blocks are derived from polyene polyols (A1) and (A2). An Independent claim is included for the process of preparation of aqueous coating composition involving: (a) preparing an isocyanate-functional prepolymer from (A1), (C1) and (B1); (b) mixing the prepolymer with (A2); and (c) dispersing the mixture with water containing (D1).