Process for preparing aqueous polymer dispersions by emulsion polymerization of compounds (monomers) via free radical polymerisable dispersion polymer and polymer dispersion with u.Ma bimodal particle size distribution

摘要

In the production of aqueous polymer dispersions by free radical emulsion polymerisation of monomers, a mini-emulsion (I) is added before or during polymerisation. (I) is an aqueous emulsion, stabilised with a surfactant, which contains emulsified monomer droplets with a particle size of 10-500 nm and a co-stabiliser, dissolved in the monomer, which is at least twice as soluble in the monomer as it is in water. Also claimed are polymer dispersions obtained in this way.