FIELD: chemistry.
SUBSTANCE: aqueous dispersion of polymers has particle diameter of at least 1 mcm and contains a fluorescent dye, characterised by that it is obtained via radical polymerisation of a suspension of ethylene-unsaturated monomers in an "oil in water" emulsion, the dispersion phase of which contains at least one fluorescent dye dissolved in at least one ethylene-unsaturated monomer, and has average particle diameter of at least 1 mcm, in the presence of at least one surface-active compound and at least 0.5 wt %, in terms of the monomer, of at least one hydrophobic, non-polymerisable organic compound, a hydrophobic polymer composed of at least one olefin with 2-6 carbon atoms with molar weight Mw of up to 10000, siloxane with molar weight Mw of up to 5000 and/or polystyrene with molar weight Mw of up to 10000. The ethylene-unsaturated monomers used are hydrophobic monomers from a group of acrylic alkylesters with 1-8 carbon atoms, methacrylic alkylesters with 1-8 carbon atoms, vinyl acetate, vinyl propionate, vinyl butyrate, styrene, chlorostyrene and/or α-methylstyrene, and the hydrophobic non-polymerisable organic compound used is aliphatic or aromatic hydrocarbons having 10-50 carbon atoms, alcohols having 10-24 carbon atoms, tetraalkyl silanes, olive oil, perfluoromethyl decalin and/or di-n-butyl dicarboxylic acid esters with 4-6 carbon atoms. The invention also relates to a method of preparing and using an aqueous polymer dispersion, power obtained from said polymer dispersion, binder, a spreading adhesive compound and a paper gluing agent based on said dispersion.
EFFECT: obtaining aqueous polymer dispersions with uniform distribution of particle size and powder based on said dispersions for marking materials.
19 cl, 14 ex, 1 tbl
