PREPARATION OF AQUEOUS EMULSIONS OR DISPERSIONS OF PARTIALLY WATER SOLUBLE MATERIALS AND THEN OPTIONAL POLYMERIZATION WHEN MATERIALS ARE MONOMERS

摘要

of the disclosure The invention provides a process for preparing an aqueous emulsion or dispersion of a partly water-soluble material, and optionally further conversion of the prepared dispersion or emulsion to a polymer dispersion when the partly water-soluble material is a polymerizable monomer. In a first step a dispersion of polymer particles is prepared containing one or more materials having a very low solubility in water, then in a second step there is added the partly water-soluble material which diffuses into the particles from the first step, and then, if the partly water-soluble material is a polymerizable monomer, polymerisation may be effected.