Process for the preparation of aqueous dispersions of latex particles having homogeneous morphology, the latex particles obtainable with the process, dispersions and re-dispersible powders, as well as their use

摘要

"PROCESS FOR THE PREPARATION OF AQUEOUS DISPERSIONS OF LATEX PARTICLES HOMOGENEOUS MORPHOLOGY, THE LATEX PARTICLES OBTAINABLE WITH THE PROCESS, DISPERSIONS AND RE-DISPERSABLE POWERS, AS WELL AS THE USE OF THE SAME". The invention relates to a process for the preparation of aqueous dispersions of latex particles having a heterogeneous morphology by a semicontinuous emulsion polymerization, comprising emulsion polymerization of ethylenically unsaturated (co) monomers, accompanied by the addition of cationic and / or emulsifiers anionic and / or non-ionic and / or protective colloids as stabilizers, which are used directly as such or synthesized in situ, semi-continuous emulsion polymerization being carried out in the presence of the stabilizer or stabilizers with a monomeric mixture, which a) contains at least one non-ionic ethylenically unsaturated monomer, with a glass transition temperature Tg above about 30 ° C in an amount of about 10 to 70 weight percent, based on the total weight of ethylenically unsaturated (co) monomers and b) by least one ethylenically unsaturated, hydrophilic monomer, in an amount of about 5 at 30 weight percent, based on the total weight of ethylenically unsaturated (co) monomers.