HIGH-TEMPERATURE HEAT-INSULATION MATERIAL AND METHOD OF MANUFACTURE THEREOF Russian patent published in 2000 - IPC

FIELD: manufacture of building materials. SUBSTANCE: material is designed for heat insulation of furnace assemblies and power equipment with surface temperature up to 1000 C. Blend contains, wt.%: swelled vermiculite, 35-60; fire-resistant clay, 36-43; electric filter dust, 1-20; bentonite, 1-3. Blend is moistened with aqueous solution containing structure-forming polyelectrolyte in amount 0.3-0.6 wt.% (above 100%) to moisture content no more than 1% and baked at 1000-1050 C. Polyelectrolyte molecule contains carboxyl, amide, nitrile, and ether groups. EFFECT: increased strength of material, reduced linear and volume shrinkage, reduced time and power consumption when drying and baking products. 2 cl