abstract |
Pyrogenated silica having a BET surface area of 200 ± 15 m 2 / g, a grindometer value of less than 30 μm and a median value of PCS of 65 to 85 nm is prepared by adding a fumed silica having a surface area of 200 ± 25 m 2 / g milled, as well as silicone rubber containing this silica. |