METHOD OF MARKING MATERIALS Russian patent published in 2011 - IPC C08F2/32 C08F2/44 C09B69/10 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of marking materials with coded microparticles. Described is a method of marking materials with coded microparticles, characterised by that the coded microparticles used are obtained (i) through polymerisation of at least one water-soluble monoethylene unsaturated monomer in the presence of at least one ethylene unsaturated monomer containing at least two double bonds in a molecule, through reverse suspension polymerisation of water in oil, where the suspension agent used is doped nanoparticles, or (ii) emulsion polymerisation of water-insoluble monoethylene unsaturated monomers containing 0-10 wt %, in terms of the mixture of monomers, of at least one ethylene unsaturated monomer containing at least two double bonds in a molecule, where the emulsifying agent for stabilising the dispersion phase is in form of doped nanoparticles, or (iii) polymerisation of at least one ethylene unsaturated monomer and a copolymerisable dye containing an ethylene unsaturated double bond and, if needed, agglomeration of these particles, where during polymerisation in accordance with (i) and (ii), nanoparticles used are radioactively doped or doped with at least one dye and one compound from the group of rare-earth elements of the periodic table. Described also are materials containing coded microparticles for marking, obtained using the described method. The invention describes use of coded microparticles obtained using the described method.

EFFECT: novel method of marking materials.

14 cl, 1 tbl, 14 ex