MONOLITHIC AEROGEL REINFORCED WITH DISPERSE FIBERS

摘要

The present invention relates to a self-supporting monolithic composite material comprising an inorganic airgel reinforced by dispersed fibers, said airgel comprising a thickening agent chosen from polyacrylic acid derivatives, cellulose derivatives, calcium acetate and silicon acetate. or their mixtures, and said material having a thermal conductivity of less than 25 mW / mK measured according to the hot plate method of the standard NF EN 12667 at 20 ° C and at atmospheric pressure. The present invention also relates to a process for the preparation of these composite materials, as well as the multilayer panels comprising them and their uses as thermal and / or phonic insulation, in particular for building, vehicles or insulation in an industrial environment.