Paper and cardboard packaging with barrier coating

Paper or cardboard packaging produced at least partly from mineral oil contaminated, recycled paper, wherein the packaging includes at least one barrier layer obtained by applying an aqueous polymeric dispersion comprising at least one copolymer obtained by emulsion polymerization of

• (a) one or more principal monomers that are C1-C4 alkyl(meth)acrylates,
• (b) 0.1 to 5 wt % of one or more acid monomers,
• (c) 0-20 wt % of acrylonitrile and
• (d) 0 to 10 wt % of one or more further monomers other than the monomers (a) to (c),
• wherein a glass transition temperature of the copolymer is in a range from +10 to +45° C.,
• wherein the copolymer does not contain any crosslinker, and
• wherein the barrier layer may be situated on one or more surfaces of the packaging, or the barrier layer may form at least one of multiple layers of a multilayered packaging coating or the barrier layer may be situated as a coating on at least one side of an inner bag situated within the packaging.