METHOD FOR WOOD IMPREGNATION AND FIRE-AND-BIOLOGICAL PROTECTIVE COMPOSITIONS FOR EFFECTUATING THE SAME Russian patent published in 2003 - IPC

FIELD: construction industry and furniture production. SUBSTANCE: method involves providing successive impregnation of wooden constructions at temperature of 10-60 C with two aqueous solutions, which are fire-and-biological protective compositions used for primary and repeated (secondary) impregnation of wooden constructions. Primary impregnation solution comprises inorganic salts possessing fire-and- biological protective properties: ammonium dihydrophosphate, heptahydrate of magnesium sulfate, borax, surfactant and water used in the following ratio, wt%: ammonium dihydrophosphate 11.0-12.0; heptahydrate of magnesium sulfate 23.0-25.0; borax 5.0-6.0; surfactant 1.0-1.5; water 55.0-60.0. Repeated (secondary) impregnation solution comprises 18.0-21.0-% aqueous solution of calcium chloride. Method and compositions are used in manufacture of cottages, furniture etc. EFFECT: increased efficiency and wider range of usage. 4 cl, 1 tbl, 16 ex