RAW MIXTURE FOR A PROTECTIVE COATING Russian patent published in 2018 - IPC C04B41/50 C04B28/04 

FIELD: construction materials.

SUBSTANCE: invention relates to construction materials and can be used for protection of various surfaces. Raw mixture for a protective coating contains, wt %: portland cement 39.18–41.20; fraction of sand 0.30 mm 32.39–32.79; micro calcite CaCO₃ with a particle size of 100 microns 7.80–8.20; bentonite clay with a specific surface of 100,000 m²/kg 0.72–0.82; a complex additive 0.86–0.98; water 17.03–18.03. Complex additive contains, wt %: a redispersible powder based on styrene-acrylate copolymer Acronal 430 47.0–52.0; iron hydroxide sol with a density of ρ = 1.107 g/cm³ and pH = 9 48.0–53.0.

EFFECT: technical result is a decrease in abrasion (by 38 %) and a decrease in shrinkage of the protective coating (by 43 %).

1 cl, 1 ex, 1 tbl