Aqueous polyurethane dispersions which can be hardened with mit UV-radiation and thermally, and use thereof

US6747088B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Reinhold Schwalm · Monsheim, DE
• Wolfgang Paulus · Lam, DE
• Uwe Meisenburg · Duisburg, DE
• Erich Beck · Ladenburg, DE
• Bernd Bruchmann · Ludwigshafen, DE
• Wolfgang Schrof · Neuleiningen, DE
• Frank Vollinger · Edenkoben, DE

Key dates

• Filing date: Mar 29, 2002
• Grant date: Jun 8, 2004
• Expiry date: Dec 7, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

UV- and heat-curable aqueous polyurethane dispersions comprise compounds attached via polyisocyanates and containing UV-polymerizable C═C double bonds, aliphatic diols incorporated by way of isocyanates and having a molecular weight of less than 500 g/mol, compounds attached via isocyanates and containing carboxylic acid or sulfonic acid groups and/or salts thereof, free hydroxyl groups, and compounds containing blocked isocyanate groups. They are suitable for coating heat-stable substrates such as metal substrates and may be used with advantage for automotive clearcoats.