Polyurethane resins prepared from active hydrogen containing material which is a dispersion of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents

US4092275A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Artur Reischl · Leverkusen, DE
• Gert Jabs
• Werner Dietrich · Odenthal, DE
• Alberto C. Gonzalez-Dorner · Bassano del Grappa, IT

Key dates

• Filing date: Nov 10, 1976
• Grant date: May 30, 1978
• Expiry date: Nov 10, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The instant invention relates to the use of stable, relatively low viscosity dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents in the preparation of polyurethane resins. The dispersions are made by a process which broadly comprises mixing an aqueous dispersion of an isocyanate-polyaddition product with a compound having at least two hydroxyl groups and having a boiling point about 100.degree. C, and thereafter at least partially distilling off the water.