Aqueous coating compositions containing water dispersible polyurethane polyureas as binders and the coatings produced therefrom

US5141987A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Nachtkamp · Cologne, DE
• Jurgen Mosbach · Bensberg, DE
• Klaus Noll · Cologne, DE
• Hans-Gunter Schmitz · Moers, DE
• Armin Sickert · Krefeld, DE

Key dates

• Filing date: Oct 26, 1990
• Grant date: Aug 25, 1992
• Expiry date: Oct 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to an aqueous coating composition containing aluminum pigments and a water dispersible polyurethane polyurea binder which contains PA0 (i) at least 200 milliequivalents per 100 g of solids of chemically incorporated carbonate groups --O--CO--O-- and PA0 (ii) a combined total of up to 320 milliequivalents per 100 g of solids of chemically incorporated urethane groups --NH--CO--O-- and chemically incorporated urea groups --NH--CO--NH--. The invention further relates to coatings prepared from the aqueous coating composition.