FIRE-RETARDANT PLASTER COMPOSITION Russian patent published in 2000 - IPC

FIELD: manufacture of building materials. SUBSTANCE: composition contains, wt %: mineral binder, 33-57; fibrous material, 1.2-3.8; air-entraining additive, 0.06-2.54; light- weight filler, 2.5-7.5; integrated additive: plasticizer based on naphthalene sulfonic acids-formaldehyde condensation product or plasticizer based on product of condensation of sulfinated phenol production bottom waste, 0.2-2.8; ground polystyrene, 1.8-6.2; and water, the balance. As ground polystyrene, mixture of polystyrene foam fraction 0.01-1.2 mm treated with alkali or alkali-earth metal silico-silicate, carbonate, or phosphate in amount of 0.5-1.5% of the weight of polystyrene foam is used. EFFECT: increased fire-retardant capability, mechanical and adhesive strength. 3 cl, 2 tbl