High molecular weight polymeric dispersions with metal scavenger

A method for manufacturing a polymer dispersion comprising the steps of

• C) providing a reaction mixture in an aqueous medium comprising
• a) a polymeric dispersant and
• b) a monomer composition comprising radically polymerizable monomers, wherein the radically polymerizable monomers are selected from the group of one or more of a non-ionic ethylenically unsaturated monomer, a cationic ethylenically unsaturated monomer, or an amphiphilic ethylenically unsaturated monomer;
• D) subjecting the monomer composition in the reaction mixture to a radical polymerization to synthesize a dispersed polymer and to form the polymer dispersion, wherein step B is performed in the presence of a metal scavenger system comprising an acid and a metal scavenger, which metal scavenger is a first carboxylic acid comprising 2, 3, 4, or 5 carboxylic acid groups and at least one nitrogen atom, and wherein the pH at the beginning of step B is from 4.5 to and
• E) stabilizing the polymer dispersion by adding a second carboxylic acid.