Liquid glass fire-retardant based on mechanically activated alumina

The influence of the silicate module of liquid glass, functional additives and mechanical activation of the filler on the composition of the fire retardant composition is shown. At temperatures up to 700 ° C, a decrease in thermal diffusivity is achieved by the formation of a heat-insulating layer foamed with vapors of water dehydrated from liquid glass. In the high-temperature region, the nepheline synthesis improves the heat-insulating properties when sodium silicate interacts with alumina. Mechanical activation of alumina enhances the effect. The addition of urea and boric acid to the composition of additives improves the fire-retardant properties of the gas environment. Tab. 2, ill. 4, bibliography: 8 titles.