Patent ID: 8722829

Claim:
A reclosable pack, comprising: a cold-sealed layer of adhesive which is recloseable after the pack has been opened, wherein the adhesive comprises an emulsion polymer comprising at least 60% by weight of principal monomers selected from the group consisting of a C1 to C20 alkyl (meth)acrylate, a vinyl ester of carboxylic acid comprising up to 20 C atoms, a vinylaromatic comprising up to 20 C atoms, an ethylenically unsaturated nitrile, a vinyl halide, a vinyl ether comprising 1 to 10 C atoms, an aliphatic hydrocarbon comprising 2 to 8 C atoms and one or two double bonds, and any mixture thereof, wherein the emulsion polymer is prepared by emulsion polymerization of free-radically polymerizable monomers in the presence of at least one protective colloid and has a glass transition temperature of from −30 to 0° C., wherein the protective colloid: (i) is in an amount of 7% to 30% by weight, based on 100 parts by weight of the polymerizable monomers, (ii) comprises at least 40% by weight of the principal monomers selected from the group consisting of a C1 to C20 alkyl (meth)acrylate, a vinyl ester of carboxylic acid comprising up to 20 C atoms, a vinylaromatic comprising up to 20 C atoms, an ethylenically unsaturated nitrile, a vinyl halide, a vinyl ether comprising 1 to 10 C atoms, an aliphatic hydrocarbon comprising 2 to 8 C atoms and one or two double bonds, and any mixture thereof, (iii) comprises at least 15% by weight of ethylenically unsaturated acid monomers optionally selected from the group consisting of acrylic acid, methacrylic acid, and any mixture thereof, and (iv) has a number-average molecular weight of 1000 to 10 000, and wherein the cold-sealed layer is formed by cold-sealing of two substrates, wherein each of the substrates is coated with an autoadhesive coating comprising the emulsion polymer.