Use of polyelectrolyte complexes for the production of polymer films with oxygen barrier properties

• Main Authors: Cimpeanu, Carmen-Elena, Diehl, Heiko, Urban, Dieter, Breiner, Thomas, Schädler, Volker, Schumacher, Karl-Heinz, Seyffer, Hermann
• Format: Patent
• Language: English; French; German
• Published: 15.04.2020
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

Use of at least a polyelectrolyte complex to provide an oxygen barrier for packaging materials made of polymer films, is claimed; where: the polymer construction components of the polyelectrolyte complex are applied to the polymer film in a polymerized form; and the polymer film is coated e.g. with an aqueous dispersion comprising a dispersed polyelectrolyte complex and produced through water-in-water emulsion polymerization, and polyelectrolyte complexes form on the mutually adjacent boundaries of the alternating layers. Use of at least a polyelectrolyte complex to provide an oxygen barrier for packaging materials made of polymer films, is claimed; where: the polymer construction components of the polyelectrolyte complex are applied to the polymer film in a polymerized form; and the polymer film is coated either with an aqueous dispersion comprising a dispersed polyelectrolyte complex and produced through water-in-water emulsion polymerization, or with a composition comprising a polyelectrolyte complex produced from an anionic polymer and cationic surfactant, or the polymer film is coated with at least three alternating layers, where each of two adjacent layers comprises an anionic polyelectrolyte construction component and the other of the two adjacent layers comprises a cationic polyelectrolyte construction component, and polyelectrolyte complexes form on the mutually adjacent boundaries of the alternating layers. An independent claim is included for the polymer film, obtained and coated using the polyelectrolyte complex, in which at least one side of the polymer film is coated with the three alternating layers.