Methods for producing and using aqueous polyurethane/polyacrylate hybrid dispersions and use of said aqueous polyurethane/polyacrylate hybrid dispersions in coating agents

US10336912B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ekkehard Jahns · Weinheim, DE
• Timo Mangel · Ludwigshafen, DE
• Christine Roesch · Mainz, DE
• Paola Romanato · Muttenz, CH
• Yeni Burk · Ludwigshafen, DE
• Joachim Pakusch · Ludwigshafen, DE

Key dates

• Filing date: Jul 29, 2015
• Grant date: Jul 2, 2019
• Expiry date: Nov 8, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/50
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides an aqueous polyurethane (PU)-polyacrylate hybrid dispersion obtainable by free radical polymerization of at least one acrylate polymer (A1) in the presence of at least one polyurethane (P1), a process for preparing these aqueous polyurethane-polyacrylate hybrid dispersions, wherein said process comprises a) preparing an aqueous polyurethane dispersion and b) using the polyurethane dispersion thus prepared as raw material for the further synthesis of a polyacrylate dispersion, and the use of the hybrid dispersion thus obtained as binder in filled coating materials, particularly as a binder for flexible roof coatings.