FIELD: chemistry.
SUBSTANCE: invention relates to solid materials based on a hydrophobic aerogel and organic binder and can be used for thermal insulation of buildings. A solid thermally insulating material, which is free of phyllosilicates, contains: 70 to 98 vol %, preferably 75 to 96 vol %, particularly 80 to 95 vol % hydrophobic quartz aerogel particles having an intrinsic density of 110 to 210 kg/m3, 0.3 to 12 vol %, preferably 0.5 to 9 vol % organic binder formed by at least one organic polymer and at least one surfactant, or at least one amphiphilic organic polymer containing both hydrophilic sequences of links or groups and hydrophobic sequences of links or groups, said volume ratios being determined by image analysis on thin sections of the solid material and being given relative to the total volume of the material, the aerogel particles having a particle size distribution having at least two maxima, the first maximum corresponding to an equivalent diameter (d) of less than 200 mcm, preferably between 25 mcm and 150 mcm and the second maximum corresponding to an equivalent diameter (D) between 400 mcm and 10 mm, preferably between 500 mcm and 5 mm. The invention also relates to a method of producing a solid thermally insulating material from said mixture and a thermally insulating product.
EFFECT: high strength and low thermal conductivity.
16 cl, 1 tbl, 9 ex
