Powder coating compositions and their use for coating heat-resistant substrates

US5510444A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Reinhard Halpaap · Odenthal, DE
• Hans-Ulrich Meier-Westhues · Leverkusen, DE
• Christian Wamprecht · Neuss, DE
• Manfred Bock · Leverkusen, DE
• Wolfgang Schultz · Krefeld, DE
• Lothar Kahl · Bensberg, DE

Key dates

• Filing date: Feb 16, 1995
• Grant date: Apr 23, 1996
• Expiry date: Feb 16, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31547
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A powder coating composition for the production of non-yellowing, flexible coatings which contains a mixture of a polyisocyanate component which contains one or more lacquer polyisocyanates having free (unblocked) isocyanate groups bound to primary and/or secondary carbon atoms and a polyol component containing one or more polyhydroxyl compounds selected from polyhydroxy polyurethanes, polyhydroxy polyacrylates and polyhydroxy polyesters, wherein at least 50% of the hydroxyl groups are bound to secondary or tertiary carbon atoms; and its use for coating heat-resistant substrates, in particular as clear coating compositions for automobiles.