TY JOUR TI PROTECTIVE COATINGS BASED ON MODIFIED PHENOLFORMALDEHYDE COMPOSITES KW protective coatings KW epoxy rubber adduct KW shungite. JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Klyuchnikova, N.V. AU Genov, I.. AU Muhacheva, V.D. AU Piskareva, A.O. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov