COMPOSITION FOR MANUFACTURING HEAT-INSULATING MATERIAL Russian patent published in 1998 - IPC

FIELD: heat insulation of industrial equipment, and heat- insulating layer of panels of building outer walls, roofs, and the like. SUBSTANCE: claimed heat-insulating material contains aqueous sodium polysilicate solution having 30-50 wt % silica. The claimed composition (in which Si O₂/ Na₂O ratio is 4.2-6.5) comprises (wt parts): 100 said aqueous solution of sodium polysilicate and 5-10 filler. Addition of aluminium hydroxide in amount of 1-3 wt parts per 100 wt parts of aqueous solution of sodium polysilicate makes it possible to decrease density of heat-insulating material up to 125-250 kg/cubic m, increase its water resistance or increase density of heat-insulating material up to 250-300 kg/cubic m and improve its strength up to 3.5-3.9 MPa. EFFECT: improved properties of the composition. 2 cl, 7 ex, 2 tbl