It is known to modify polyvinyl acetate dispersions in the form of homopolymers or copolymers, to modify poly(meth)acrylate dispersions as homopolymers or copolymers, such as with methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, acrylic acid and/or methacrylic acid as monomer and comonomer, to modify styrene acrylate dispersions with styrene comonomer, and to modify polyvi