| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a silica body having a low refractive index and excellent adhesion with a base material and the upper layer thereof. <P>SOLUTION: The silica body has the refractive index of ≤1.40, equal to or below 0.05-0.2 g/g difference Δ of water vapor adsorption at 20°C in relative water vapor pressure (P/P<SB>0</SB>) of 0.3≤P/P<SB>0</SB>≤0.9 (P: water vapor partial pressure and P<SB>0</SB>: saturated water vapor pressure at 25°C) and ≤0.14 g/g water vapor adsorption at 25°C in relative water vapor pressure P/P<SB>0</SB>=0.3. The silica body having refractive index of ≤1.40 is produced by wet-film-forming a silica-based composition containing an alkoxysilane compound, water, an organic solvent and a template material on the base material and after that, heating at ≤220°C. <P>COPYRIGHT: (C)2011,JPO&INPIT |
