The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2015
Filed:
Aug. 17, 2010
Carmen-elena Cimpeanu, Ludwigshafen, DE;
Thomas Breiner, Laudenbach, DE;
Dieter Urban, Speyer, DE;
Karl-heinz Schumacher, Neustadt, DE;
Volker Schaedler, Ann Arbor, MI (US);
Heiko Diehl, Mannheim, DE;
Hermann Seyffer, Heidelberg, DE;
Carmen-Elena Cimpeanu, Ludwigshafen, DE;
Thomas Breiner, Laudenbach, DE;
Dieter Urban, Speyer, DE;
Karl-Heinz Schumacher, Neustadt, DE;
Volker Schaedler, Ann Arbor, MI (US);
Heiko Diehl, Mannheim, DE;
Hermann Seyffer, Heidelberg, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The use of polyelectrolyte complexes is described, for providing an oxygen barrier to packaging materials made of polymer foils. Polymeric components of the polyelectrolyte complex are applied in polymerized form to the polymer foil. The polymer foil is either coated with an aqueous dispersion comprising a dispersed polyelectrolyte complex previously produced by water-in-water emulsion polymerization, or is coated with a composition comprising a polyelectrolyte complex produced from anionic polymer and from cationic surfactant, or the polymer foil is coated with at least three alternating layers, where respectively one of two adjacent layers comprises an anionic polyelectrolyte component and the other of two adjacent layers comprises a cationic polyelectrolyte component, and polyelectrolyte complexes form at the opposite, adjacent interfaces of the alternating layers.