RAW MIXTURE FOR 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 40.2–42.6; sand of fraction 0.30 mm 20.5–21.3; micro calcite with a particle size of 100 microns 16.4–16.9; a complex additive 2.5–3.0; water 18.0–18.6. Complex additive contains, wt %: a redispersible powder based on styrene acrylate copolymer Acronal 430 97.3–97.8; natural shungite with silica particle size SiO₂ of 10 nm 2.2–2.7.

EFFECT: technical result is an increase in adhesion strength and frost resistance of the protective coating.

1 cl, 1 ex, 1 tbl