Polymer blends in the form of aqueous dispersions or water-redispersible powders

The invention relates to polymer mixtures containing in the form of aqueous dispersions or water-redispersible powders A) one or more polymers of one or more vinyl halides and optionally one or more further ethylenically unsaturated monomers and B) one or more vinyl halide-free polymers of one or more ethylenically unsaturated monomers.