| abstract |
Surface-modified, fumed silica having the data BET surface area, m<SP>2</SP>/g: 25-400 Average primary particle size, nm: 5-50 pH: 3-10 Carbon content, % by weight: 0.1-10 Potassium content (calculated as potassium oxide), % by weight: 0.000001-40 is prepared by subjecting a fumed silica to surface modification in the presence of potassium compounds. It can be used in LSR silicone rubber compositions as a filler. |