METHOD OF PRODUCING FOAMED GLASS AND MIXTURE FOR PRODUCING FOAMED GLASS Russian patent published in 2013 - IPC C03C11/00 C03B19/08 

FIELD: chemistry.

SUBSTANCE: invention relates to production of heat-insulating materials. Condensed microsilica, sodium hydroxide and hot water at 80-90°C are mixed in a reactor for 10-15 minutes until formation of liquid glass. The liquid glass is then mixed with expanded pearlite for 10 minutes. The mixture is foamed in the closed volume of a metal mould at temperature of up to 780°C for 0.5-1 hours. The finished articles are annealed at temperature ranging from 780°C to 360°C for 1 hour, followed by cooling on air. The following components are used to prepare the mixture for producing foamed glass, wt %: expanded pearlite with density of 75-100 kg/m³ - 20; condensed microsilica - 28; sodium hydroxide - 12; water - 40.

EFFECT: reducing density of foamed glass to 200-300 kg/m³ and foaming temperature to 780°C.

2 cl, 1 tbl