| 摘要 |
<p>A silica product preferably obtained from geothermal water, its uses (e.g. with paper) and preparation. It has a tertiary aggregate structure (preferably of Type I, II or III as defined in EP 0396242) with an average secondary particle dimensions up to about 30 nm., an oil absorption of greater than about 190 g.100g-1 as measured by the spatula rubout method using linseed oil, a light scattering coefficient greater than about 280 m2.kg-1, a reflectance of greater than about 95 % at a wavelength of 557 nm.(using illuminant D65 and 10° viewing angle), and a BET surface area of greater than about 4m2.g-1.</p> |
