초록

Described is a method of producing an aqueous polymer dispersion, the method calling for further polymerization of the dispersion using a radical mechanism redox initiator system including as the reducing agent the addition compound obtained between a lower ketone and hydrogen sulphite.

대표청구항 ▼

[ We claim:] [1.] A process for the preparation of an aqueous polymer dispersion, in which an aqueous dispersion of a polymer which contains at least two monomers A and B which differ from one another, have at least one ethylenically unsaturated group and are incorporated in chemically bonded form i

[ We claim:] [1.] A process for the preparation of an aqueous polymer dispersion, in which an aqueous dispersion of a polymer which contains at least two monomers A and B which differ from one another, have at least one ethylenically unsaturated group and are incorporated in chemically bonded form is produced, in a manner known per se, so that the total content of monomers which are free, ie. not chemically bonded, and have at least one ethylenically unsaturated double bond in the aqueous polymer dispersion is from >0 to .ltoreq.1% by weight, based on the aqueous polymer dispersion, and this residual monomer content is then reduced by the action of a free radical redox initiator system comprising at least one oxidizing agent and at least one reducing agent, wherein the redox initiator system comprises, as the reducing agent, the adduct of a ketone of 3 to 8 carbon atoms with the bisulfite anion or the conjugated acid of this adduct.