| abstract |
Described is an aqueous copolymeric polyvinyl ester dispersion containing A) 100 parts by weight of a copolymer derived from A1) from 34.9 to 95% by weight of vinyl esters of aliphatic, saturated carboxylic acids, A2) 4.9 to 65% by weight of maleic acid esters and / or fumaric acid esters of monohydric aliphatic alcohols having a chain length of C 1 -C 18 and / or alpha-olefins having 2 to 8 C atoms, A3) from 0.1 to 10% of at least one comonomer having at least one stabilizing nonionic or ionic group and A4) optionally further comonomers, the sum of the components A1, A2 and A3 and optionally A4 giving 100% by weight, B) 0.1 to 4.5 parts by weight, based on the total amount of the monomers used, preferably 0.5 to 3.5 parts by weight of at least one protective colloid, preferably polyvinyl alcohol, C) 0.1 to 10 parts by weight, based on the total amount of monomers used, preferably 0.5 to 5.0 parts by weight of a nonionic emulsifier, and D) if appropriate, further additives suitable for the coating of foods. The dispersion is prepared by free-radical emulsion polymerization and is suitable for coating foods. The films of these dispersions are characterized by a low water vapor transmission rate. |