SELF-LEVELLING MAGNESIA COMPOSITION Russian patent published in 2012 - IPC C04B28/30 C04B111/20 

FIELD: construction.

SUBSTANCE: self-levelling magnesia composition, containing a magnesia cement, including active magnesium oxide and a salt component in the form of an aqueous solution of magnesium chloride, an inert filler - a quartz or granite sand, a stabilising and a water-retaining additive, and also a complex modifying additive, the active magnesium oxide is caustic brusite, and the stabilising and water-retaining additive is higher alcohol of the row C₁₂-C₁₈. At the same time the modifying complex additive consists of a hydrophobic surfactant in the form of a copolymer of vinyl chloride\ethylene\ vinyl laurate or vinyl acetate \versatate\ acrylate, or vinyl acetate\ vinyl alcohol and hydroxycarboxylic acid at the following ratio of components, wt %; caustic brucite 21.0-31.5, filler - quartz or granite sand 31.5-53.2, stabilising and water-retaining additive - alcohol of the row C₁₂-C₁₈ 0.5-1.8, complex modifying additive: the specified hydrophobic surfactant of copolymer 0.5-1.0, hydroxycaroxylic acid 0.2-1.5, salt component - aqueous solution of the magnesium oxide - balance.

EFFECT: increased time of composition viability, higher strength in compression, improved decorative properties of the composition, expansion of raw base of the magnesium cement and assortment of materials on its basis.

2 tbl