Patent ID: 8802759

Claim:
An aqueous polymer dispersion P, comprising: 0.1% to 10% by weight of at least one additive of formula (I) R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are H or C 1 -C n′ alkyl, and R 1 to R 6 are either identical or different, X and Y are Cl, Br, or I, and each of n, n′, and m individually represents an integer of 1-8, and wherein the dispersion is obtained by free-radical aqueous emulsion polymerization of a monomer mixture comprising a) 45 to 70 parts by weight of at least one first monomer whose homopolymer has a glass transition temperature T g <20° C., b) 30 to 55 parts by weight of at least one second monomer whose homopolymer has a glass transition temperature T g >50° C., and c) 0 to 30 parts by weight of at least one third monomer.