FINE-PARTICULATE POLYMER DISPERSIONS COMPRISING STARCH
The invention relates to fine-particulate polymer dispersions comprising starch, obtained by radically initiated emulsion copolymerization of ethylenically unsaturated monomers in the presence of a redox initiator and an enzymatically degraded starch, wherein the enzymatic degradation of starch is stopped by adding at least one acid comprising a phosphorus atom to the reaction mixture. According to the invention, at least one acid comprising a phosphorus atom is used in order to stop the enzymatic degradation of starch and the fine-particulate polymer dispersions comprising starch of emulsion polymers are used as sizing agents for paper and paper products, particularly as surface sizing agents.