FIELD: composite materials.
SUBSTANCE: invention relates to a coated product containing: (1) a substrate transparent to electromagnetic radiation with a frequency from 22 to 81 GHz; and (2) a cured film-forming composition applied to at least one substrate surface and cured on it, wherein the cured film-forming composition contains: (a) the first film-forming polymer having reactive functional groups and obtained from a reaction mixture containing siloxane, wherein the first film-forming polymer (a) is contained in the cured film-forming composition in an amount of 20 to 40 wt. %, based on the total mass of resin solids in the cured film-forming composition; (b) a second film-forming polymer other than the first film-forming polymer (a) and obtained from a reaction mixture containing at least one hydrophobic monomer containing siloxane, wherein the second film-forming polymer (b) is contained in the cured film-forming composition in an amount of 0.5 to 15 wt. %, based on the total mass of resin solids in the cured film-forming composition; and (c) a hardener containing functional groups reactive with respect to reactive functional groups in (a ). At the same time, when applying a cured film-forming composition to a substrate with the formation of a coating layer, the first film-forming polymer (a) is distributed throughout the coating layer, and the concentration of the second film-forming polymer (b) is higher in the surface area of the coating layer than the concentration of the second film-forming polymer (b) in the bulk area of the coating layer; and the coated product demonstrates transmission of electromagnetic radiation with a frequency of 22 to 81 GHz in the range of 70 to 100%. The invention also relates to two variants of a method for reducing the accumulation of contaminants on a substrate transparent to electromagnetic radiation with a frequency from 22 to 81 GHz, and a coated vehicle component. The resulting coatings are transparent to electromagnetic radiation with a frequency from 22 to 81 GHz.
EFFECT: expansion of the range of coatings transparent to electromagnetic radiation.
18 cl, 2 tbl, 3 ex
