MULTI-LAYER ANTIFOULING COATING Russian patent published in 2018 - IPC C09D163/02 B82B3/00 C09D5/14 C09D5/16 

FIELD: chemistry.

SUBSTANCE: coating is described, comprising a primer layer, an intermediate layer based on an epoxy resin and an amine type hardener, and an external self-polishing biocidal layer, in which an epoxy resin modified with a coal tar containing (wt %) is used as a base in the primer and intermediate layers: phenols 8-18, paraffins and olefins 4-12, neutral oxygen compounds 20-30, carboxylic acids 1-2, pyridine bases 1-3, aromatic hydrocarbons 22-34, and a water-soluble solvent, solvating power is not less than that of water, red iron oxide is further introduced into the intermediate layer and the outer self-polishing layer is based on copper acrylate with the addition of nano-dispersed low molecular weight polytetrafluoroethylene.

EFFECT: increased effectiveness of protection against fouling of concrete and reinforced concrete surfaces, operated in fresh and sea water.

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