Aqueous dispersion of polyurethane resins, the production thereof and polyurethane macromers suitable for this purpose, as well as their use in aqueous coating agents

US5569705A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Bettina Vogt-Birnbrich · Solingen, DE
• Hans-Peter Patzschke · Wuppertal, DE
• Werner Lenhard · Wuppertal, DE
• Jurgen Dobert · Sprockhövel, DE
• Marcus Brunner · Wuppertal, DE
• Walter Schubert · Wuppertal, DE

Key dates

• Filing date: Feb 27, 1995
• Grant date: Oct 29, 1996
• Expiry date: Feb 27, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/831
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

There are described aqueous dispersions of polyurethane resins, the production thereof and their use in aqueous coating agents, said dispersions being obtainable in aqueous or non-aqueous phase from PA1 a) polyurethane resins with at least one CH acidic group, an ionic or non-ionic hydrophilic group and, optionally, OH and/or NH groups, by PA1 b) introduction of olefinic double bonds by reaction with PA1 b.sub.1) compounds with a CH acidic group and an olefinic double bond, and/or PA1 b.sub.2) compounds with an olefinic double bond and also a group that is capable of reacting with CH acidic groups, and/or PA1 b.sub.3) compounds with an olefinic double bond and also a group that is capable of reacting with OH or NH groups, or PA1 b.sub.4) formaldehyde, whereupon, optionally, conversion into the aqueous phase and radical polymerization are effected.