PRIMING COMPOUND FOR CREATING A LIGHT CONDUCTIVE PRIMING COATING OF A PART PRIOR TO ELECTROSTATIC COLOURING, METHOD FOR PREPARING THE PRIMING COMPOUND, AND PRIMING COATING Russian patent published in 2022 - IPC C09D5/24 C09D7/40 C09D7/80 C09D5/44 C09D201/00 B82Y30/00 

FIELD: electricity.

SUBSTANCE: invention relates to conductive coatings, in particular, to conductive priming coatings of parts prior to electrostatic colouring thereof, as well as to priming compositions for creating such coatings. The present invention proposes a priming composition for creating a light conductive priming coating of a part prior to electrostatic colouring. The priming compound for creating a conductive priming coating with a light reflectance value of at least 60% of a part made of a polymer or composite material with a surface resistance greater than 10¹⁰ Ohm/square prior to electrostatic colouring comprises a solvent, a film-forming agent, a pigment or a mixture of pigments, an additive increasing the adhesion of the primer to the material of the coloured part and to the outer coating material, and a conductive additive. The priming composition therein comprises single-walled and/or double-walled carbon nanotubes as a conductive additive in a concentration of more than 0.005% wt. and less than 0.1% wt., from 5 to 40% wt. of one or multiple white pigments from zinc oxide, titanium dioxide, calcium carbonate, barium sulphate, as a pigment or a mixture of pigments, and additionally comprises from 0.1 to 2% wt. of a dispersant, and the degree of grinding of the priming composition is not more than 20 mcm. Also described is a method for preparing the priming compound and a conductive priming coating with a light reflectance value of at least 60%, produced by applying the priming compound to the surface of a part and drying.

EFFECT: production of a light conductive priming coating with a specific surface resistance of less than 10⁹ Ohm/square and a light reflectance value (LRV) of at least 60%.

16 cl, 4 dwg, 1 tbl, 9 ex