Stable polyurethane dispersions and process for production thereof

US4089835A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus Konig · Leverkusen, DE
• Manfred Dietrich · Leverkusen, DE

Key dates

• Filing date: May 28, 1976
• Grant date: May 16, 1978
• Expiry date: May 28, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/928
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The instant invention is directed to stable dispersions and the process of their manufacture. The stable dispersions of the instant invention comprise polyureas and/or polyhydrazo-dicarbonamides as the disperse phase in an hydroxyl group containing material selected from the group consisting of polyethers, polyesters, polyester amides, polycarbonates, and mixtures thereof, and are produced by reacting (1) organic polyisocyanates with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides in (3) the hydroxyl group containing material. Component (3) may also contain relatively low molecular weight polyols and/or inert organic solvents. Components (1), (2) and (3) are continuously introduced into a flow mixer in such a quantity that the average residence time in the mixer is less than ten minutes.