Patent ID: 7847004

Claim:
A process for preparing an aqueous dispersion of composite particles comprising an addition polymer and finely divided inorganic solid, said process comprising free-radical aqueous emulsion polymerization of a monomer mixture of ethylenically unsaturated monomers dispersely distributed in aqueous medium in the presence of at least one free-radical polymerization initiator and in the presence of at least one dispersely distributed, finely divided inorganic solid and at least one dispersant, wherein the monomer mixture comprises at least one ethylenically unsaturated monomer A and >0 and ≦10% by weight of at least one ethylenically unsaturated epoxide monomer B comprising an epoxide group, wherein monomer A is selected from the group consisting of ethylene, vinylaromatic monomers, esters of vinyl alcohol and C 1 -C 18 monocarboxylic acids, esters of C 3 -C 6 α,β-monoethylenically unsaturated mono- and dicarboxylic acids with C 1 -C 12 alkanols, nitriles of α,β-monoethylenically unsaturated carboxylic acids, and C 4-8 conjugated dienes, and which monomer A optionally additionally comprises an ethylenically unsaturated monomer which comprises a siloxane group.