Paper and cardboard packaging with barrier coating

US8771812B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hermann Seyffer · Heidelberg, DE
• Carmen-Elena Cimpeanu · Ludwigshafen, DE
• Ines Pietsch · Speyer, DE
• Axel Weiss · Wilmington, US
• Peter Preishuber-Pfluegl · Ludwigshafen, DE
• Heiko Diehl · Mannheim, DE
• Marc Bothe · Schifferstadt, DE
• Florian Buesch · Speyer, DE

Key dates

• Filing date: May 29, 2012
• Grant date: Jul 8, 2014
• Expiry date: May 29, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1359
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Described is paper or cardboard packaging produced from mineral oil contaminated, recycled paper, wherein the packaging includes a barrier layer obtainable by applying an aqueous polymeric dispersion comprising a copolymer obtainable by emulsion polymerization of C1-C4 alkyl(meth)acrylates, acid monomers, e.g., acrylic acid or methacrylic acid, 0-20 wt % of acrylonitrile and 0 to 10 wt % of further monomers, wherein the glass transition temperature of the copolymer is in the range from +10 to +45° C. The barrier layer may be situated on one of the surfaces of the packaging or form one of multiple layers of a multilayered packaging coating or be situated as a coating on one side of an inner bag situated within the packaging.