| abstract |
In a composite material contg. 10-97 vol.% aerogel particles and adhesive(s). The dia. of the aerogel particles is less than 0.5 mm. Also claimed is a method of making the composite. Pref. the adhesive is a phenol-, resorcinol-, urea- and/or melamine-HCHO resin. The aerogel is used in a fraction of 40-95 vol.% and has a particle dia. of less than 0.2 mm, esp. with bimodal distribution. It esp. is a SiO2 aerogel, more esp. with permanently hydrophobic gps. on the surface. Its porosity is more than 60% and density less than 0.6 g/cm<3>. The composite may also contain fillers. The composite material has a density of less than 0.6 g/cm<3> and thermal conductivity of less than 100 mW/m.K. It esp. has hydrophobic surface(s). |