Aqueous polymer dispersion for hot air sealing of a paper packaging

Abstract

Described is an aqueous polymer dispersion obtained or obtainable from a first aqueous polymer dispersion A comprising an acid-free copolymer prepared in the presence of an acid-rich copolymer and a second aqueous polymer dispersion B comprising a polyurethane. The aqueous polymer dispersion can be used for hot air sealing of a paper packaging, wherein the paper packaging preferably is a folding box for food or a paper cup for hot or cold drinks.