FIELD: chemistry.
SUBSTANCE: invention relates to polymer compositions for direct part marking (DPM). Invention is aimed at creation of planarising polymer composition, solidified by drying, photo- or thermo- polymerisation, and formation of DPM by layer-by-layer application on the surface to be marked of planarising and fluorescent polymer compositions. Planarising composition includes polymerisation or polycondensation polymer from the group of urethane, alkide, acryl film-generating, at least two solvents from the series: acetone, toluene, ethylacetate, cellosolve, diethyl ether, butylacetate additive-filler, siccative and additive. Direct part marking includes application of said planarising polymer composition on the surface to be marked with formation on the surface to be marked of coating layer, gluing mechanically strong film with limited adhesion on coating layer, formation of holes in glued film and hollows in the surface to be marked by dot-peen method, filling them with fluorescent (F) composition, absorbing light radiation at wavelengths of UV visible and nearest UR ranges and irradiating in range of wavelengths 600-700 nm, and removal of said mechanically strong film.
EFFECT: reduction of geometrical inhomogeneities of the surface to be marked in range of dimensions, close to geometrical dimensions of information elements of marking, and simplification of technology of manufacturing and further decoding of 2D FDPM.
5 cl, 6 dwg, 6 ex
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