Isocyanate-free polyurethane dispersions

US4758475A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Eckes · Eppstein, DE
• Dieter Engel · Kelsterbach, DE

Key dates

• Filing date: Dec 18, 1986
• Grant date: Jul 19, 1988
• Expiry date: Dec 18, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31942
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethane dispersions based on reaction products from (A) bismethylolated urethanes having at least 2 urethane groups and (B) polyhydroxyl compounds which contain groups which are capable of ion formation, these groups being present in neutralized form, and a process for the preparation thereof. The use of the dispersions for the surface-coating of metal, plastics, glass, leather and paper.