One-component aqueous coating compositions containing polyurethane and phyllosilicates for oxygen barrier coatings

US11136463B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ines Pietsch · Speyer, DE
• Konrad Roschmann · Ladenburg, DE
• Christine TONHAUSER · Ludwigshafen, DE
• Kristina Georgieva · Mannheim, DE
• Josef Breu · Bayreuth, DE
• Patrick FEICHT · Bayreuth, DE

Key dates

• Filing date: Jan 25, 2017
• Grant date: Oct 5, 2021
• Expiry date: Jul 23, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2201/008
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described is an aqueous one-component coating composition comprising dispersed polyurethane and phyllosilicate. The polyurethane carries acid groups which are at least partially neutralized with a hydrophilic base selected from inorganic bases and organic mono-amines. The hydrophilic base has a water solubility at 20° C. of at least 150 g/l, preferably of at least 200 g/l. The composition can be used for providing oxygen barrier properties to a polymer film.