A method for manufacturing a polymer dispersion comprising the steps of preparing a reaction mixture comprising (i) a polymeric dispersant; and (ii) a monomer composition comprising radically polymerizable monomers; optionally, heating the reaction mixture to a temperature above room temperature; polymerizing the radically polymerizable monomers by adding to the reaction mixture sequentially or simultaneously (iii) a predetermined amount of a redox initiator system comprising an oxidizing agent and a reducing agent; (iv) a predetermined amount of a first radical initiator; and (v) a predetermined amount of a second radical initiator; wherein the second radical initiator is neither identical to the oxidizing agent which is comprised in the redox initiator system, nor to the first radical initiator; with the proviso that at least a portion of said predetermined amount of the redox initiator system, at least a portion of said predetermined amount of the first radical initiator, and at least a portion of said predetermined amount of the second radical initiator is added to the reaction mixture before 90 mol-% of the radically polymerizable monomers, which were originally contained in the monomer composition, are polymerized; and optionally, reducing the residual monomer content by adding to the reaction mixture - the remainder of said predetermined amount of the redox initiator system, the remainder of said predetermined amount of the first radical initiator, and/or the remainder of said predetermined amount of the second radical initiator; and/or - a third radical initiator. preparing a reaction mixture comprising (i) a polymeric dispersant; and (ii) a monomer composition comprising radically polymerizable monomers; (i) a polymeric dispersant; and (ii) a monomer composition comprising radically polymerizable monomers; optionally, heating the reaction mixture to a temperature above room temperature; polymerizing the radically polymerizable monomers by adding to the reaction mixture sequentially or simultaneously (iii) a predetermined amount of a redox initiator system comprising an oxidizing agent and a reducing agent; (iv) a predetermined amount of a first radical initiator; and (v) a predetermined amount of a second radical initiator; wherein the second radical initiator is neither identical to the oxidizing agent which is comprised in the redox initiator system, nor to the first radical initiator; with the proviso that at least a portion of said predetermined amount of the redox initiator system, at least a portion of said predetermined amount of the first radical initiator, and at least a portion of said predetermined amount of the second radical initiator is added to the reaction mixture before 90 mol-% of the radically polymerizable monomers, which were originally contained in the monomer composition, are polymerized; and (iii) a predetermined amount of a redox initiator system comprising an oxidizing agent and a reducing agent; (iv) a predetermined amount of a first radical initiator; and (v) a predetermined amount of a second radical initiator; optionally, reducing the residual monomer content by adding to the reaction mixture - the remainder of said predetermined amount of the redox initiator system, the remainder of said predetermined amount of the first radical initiator, and/or the remainder of said predetermined amount of the second radical initiator; and/or - a third radical initiator. - the remainder of said predetermined amount of the redox initiator system, the remainder of said predetermined amount of the first radical initiator, and/or the remainder of said predetermined amount of the second radical initiator; and/or - a third radical initiator.