COMPOSITION FOR FIRE AND BIOLOGICAL PROTECTION OF WOOD Russian patent published in 2002 - IPC

FIELD: woodworking. SUBSTANCE: invention, which can be applied in a variety of areas where noncombustible and rot-resistant materials and units are used, provides composition for fire- and biological-protection coatings, which contains equimolecular mixture of phosphorous acid-urea interaction products. Depending on which value of relative viscosity and, respectively, which degree of fire protection is needed, corresponding amount of water is added. Advantageously, phosphorous acid-urea interaction is carried out at 45-54 C and composition is diluted with 25-30 wt % of industrial water to achieve viscosity 9.8-10.4 sq.mm/c. In order to deepen impregnation of wood, composition is supplemented by 0.1-0.5 wt % of nonionic surfactant. EFFECT: lowered viscosity of finished product. 2 cl, 2 tbl, 3 ex