Aqueous polyurethane dispersions having improved water and solvent resistance

US6248415A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Josef Pedain · Cologne, DE
• Eberhard Arning · Kaarst, DE
• Dieter Mager · Leverkusen, DE
• Lutz Schmalstieg · Neunburg vorm Wald, DE
• Ronald-Karl Jerg · Neunburg vorm Wald, DE

Key dates

• Filing date: Jul 17, 1998
• Grant date: Jun 19, 2001
• Expiry date: Jul 17, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31989
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to aqueous polyurethane dispersions prepared from a polyisocyanate component and one or more isocyanate-reactive compounds wherein at least 5% by weight of polyisocyanate component is a diisocyanate corresponding to formula (I) ##STR1## wherein PA1 R is a difunctional, C.sub.4 to C.sub.18, aliphatic, cycloaliphatic or aromatic hydrocarbon residue obtained by removing the NCO groups from an organic diisocyanate and PA1 R' is a monofunctional, C.sub.1 to C.sub.18 hydrocarbon radical, which may contain ether oxygen atoms. The present invention also relates to the use of these PUR dispersions for coating any substrates, preferably wood substrates, such as parquet flooring.