Process for the production of aqueous stoving coating compositions

US5981653A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Oswald Wilmes · Recklinghausen, DE
• Lothar Kahl · Bensberg, DE
• Bernd Klinksiek · Bensberg, DE
• Christian Wamprecht · Neuss, DE
• Manfred Bock · Leverkusen, DE
• Klaus Nachtkamp · Cologne, DE

Key dates

• Filing date: Apr 22, 1997
• Grant date: Nov 9, 1999
• Expiry date: Apr 22, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of aqueous dispersions which form powder coatings at room temperature, have an average particle size of 0.1 to 10 .mu.m, contain polyols and blocked polyisocyanate crosslinking agents, and, after stoving, yield coatings with improved water and solvent resistance, in particular on metallic substrates.