Use of a coating layer with a styrene-butadiene copolymer on a paper substrate for blocking oxygen transfer

US10837140B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hermann Seyffer · Heidelberg, DE
• Carmen-Elena Cimpeanu · Ludwigshafen, DE
• Theo Smit · Heidelberg, DE
• Nico Veling · Heidelberg, DE
• Juergen Schmidt-Thuemmes · Schifferstadt, DE
• Dirk Lawrenz · Ludwigshafen am Rhein, DE
• Rainer Blum · Ludwigshafen, DE

Key dates

• Filing date: May 13, 2016
• Grant date: Nov 17, 2020
• Expiry date: Apr 15, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/265
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a use of a coating layer on a paper substrate for blocking oxygen transfer through the coated paper substrate, wherein the coating layer on the paper substrate is obtainable by a process, which comprises the steps of (a) providing a paper substrate with a surface, (b) applying onto the surface of the provided paper substrate an aqueous coating mass, and (c) drying of the paper substrate with the applied aqueous coating mass to obtain the coated paper substrate, wherein the aqueous coating mass contains an aqueous dispersion of a copolymer P, which is obtainable by radically initiated emulsion polymerization of at least 40 parts by weight of styrene and 22 to 49 parts by weight of butadiene and optionally other monomers based on the sum total of the parts by weight of all monomers, which is always 100, in the presence of a first degraded starch. It relates further to a coated paper substrate obtainable with a coating mass comprising the aqueous dispersion of the copolymer P and a further saccharide, which is added after the polymerization of the monomers. It relates also to a process for manufacturing the coated paper substrate obtainable with a coating mass…