Coating composition comprising diverse anionic polyurethane-polyurea dispersions

US6482885B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hanns P. Muller · Leverkusen, DE
• Horst Gruttmann · Leverkusen, DE
• Joachim Petzoldt · Monheim, DE
• Heino Muller · Leverkusen, DE
• Jurgen Meixner · Krefeld, DE
• Gerald Kurek · Leverkusen, DE

Key dates

• Filing date: Jul 24, 2000
• Grant date: Nov 19, 2002
• Expiry date: May 29, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D5/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to coating compositions comprising a mixture of at least two aqueous, anionic polyurethane polyurea dispersions A and B, wherein dispersion A as a dry film has a TG in the range from −30° C., to −45° and dispersion B as a dry film has a first TG in the range from −30° C. to −45° C. and a second TG in the range from +45° C. to +60° C., and the mixture of A and B as a dry film has only one TG in the range from −30° C. to −45° C.