| 摘要 |
PURPOSE:To prepare the title aerogel excellent in thermal insulating and light transmission properties and free from degradation with time in those properties due to adsorption of water, etc., by hydrolyzing and polycondensing a specific alkoxysilane, surface-treating the resulting gel in a specific way, and drying it in a supercritical state. CONSTITUTION:An alkoxysilane of the formula: SiR<1>n(OR<2>)4-n (wherein R<1> and R<2> are each 1-5C alkyl or phenyl; and n is 0-2) is hydrolyzed and polycondensed. The resulting gel is made hydrphobic by treating with a surface-treating agent (e.g. trimethylchlorosilane) and then dried in a supercritical state. |
