Basf Coatings Ag

Ralf Stein

Egon Wegner

Ulrike R&ouml;ckrath

Georg Wigger

Lutz-Werner Gross

Marita Schilling

B&auml;rbel Wiatr

Gudrun Wiemann

Aqueous coating material comprising (A) water-dispersible hydroxy-functional binder component containing urethane groups, (B) water-dispersible binder component containing urethane groups and blocked isocyanate groups, (C) water-dispersible amino resin, and optionally (D) water-dispersible hydroxy-functional polyester, the binder component (B) being preparable by (B1) preparing a polyurethane prepolymer containing isocyanate groups from at least one polyol and at least one polyisocyanate, (B2) reacting the polyurethane prepolymer (B1) containing isocyanate groups with a chain extender to give a hydroxyl-containing chain-extended polyurethane prepolymer, (B3) reacting the hydroxyl-containing chain-extended polyurethane prepolymer (B2) with at least one polyisocyanate to give a further polyurethane prepolymer containing isocyanate groups, and (B4) blocking some or all of the isocyanate groups of the chain-extended polyurethane prepolymer (B3) containing isocyanate groups with a blocking agent to give a polyurethane containing blocked isocyanate groups, and then, where appropriate, (B5) reacting remaining free isocyanate groups in the polyurethane (B4) with a chain extender.

Aqueous coating material, especially aqueous filler or protective base against stones

Coating formulation for use in aqueous multicoat paint systems

Aqueous coating materials and their use for the production of filler

Growing community of inventors

Münster, Germany

Ralf Stein