Heat cross linkable polyurethane coating compositions

US4308184A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wilhelm Thoma · Leverkusen, DE
• Gerhard Berndt · Seevetal, DE
• Josef Pedain · Cologne, DE
• Walter Schroer · Leverkusen, DE
• Waldemar Kling · Kandern, DE

Key dates

• Filing date: Mar 29, 1979
• Grant date: Dec 29, 1981
• Expiry date: Mar 29, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31591
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present disclosure is concerned with solvent free or very low solvent coating compositions suitable for use on flexible sheet form substrates particularly textile substrates. The composition comprises a urethane group-containing prepolymer with OH or CONH.sub.2 terminal groups mixed with a urea or melamine formaldehyde resin and a stable aqueous polymer dispersion or solution. The composition may also contain small amounts of an organic solvent. The coating can be applied to the substrate by direct or reverse coating techniques.