Process and apparatus for continuous production of aqueous polyurethane dispersions

US10752727B1 · kind B1 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Hans Georg Grablowitz · Cologne, DE
• Alexander Pross · Bensberg, DE
• Reiner Witkowski · Bottrop, DE
• Holger Breuer · Kaarst, DE
• Sven Gestermann
• Christian Hahn · Leverkusen, DE
• Stephan Schubert · Leverkusen, DE
• Joachim C. Ritter · Wilmington, US

Key dates

• Filing date: Jul 7, 2016
• Grant date: Aug 25, 2020
• Expiry date: Nov 5, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/758
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The application relates to a process for continuously producing aqueous polyurethane dispersions, which is characterized by the use of micro structured mixing elements and addition of water twice during the dispersion step. The energy input in the mixing of the dispersion is low. In addition, the application describes an apparatus suitable for execution of the aforementioned process.