| 摘要 |
Paper or cardboard packaging produced from recycled paper contaminated by mineral oil, where the packaging includes a barrier layer obtained by applying an aqueous polymeric dispersion containing a mixture of at least two polymers A and B. Polymer A is obtained by emulsion polymerization of C1-C4 alkyl(meth)acrylates, acid monomers, e.g., acrylic acid or methacrylic acid, 0-20 wt % of acrylonitrile and 0-10 wt % of further monomers, where the glass transition temperature of copolymer A is greater than +45° C. and the glass transition temperature of polymer B is less than +10° C. The mean value calculated from the glass transition temperatures of the individual polymers is +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.
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