AEROSIL® 300 Hydrophilic Fumed Silica AEROSIL® 300 is a hydrophilic fumed silica with a specific surface area of 300 m2/g. Applications and Properties Applications l Paints and coatings l HTV - and liquid silicone rubber (LSR) l Cable compounds and unsaturated polyester resins l Adhesives and sealants l Printing inks Properties l Rheology and thixotropy control of liquids, binders, polymers, etc. l Optimal dispersion yields best results in pronounced thickening and thixotropy l Reinforcement of HTV- and liquid silicone rubber (LSR) at a high transparency level. l Excellent transparency in unsaturated polyester resins. Physico-chemical Data Properties Unit Typical Value Specific surface area (BET) m2/g 300 ± 30 Average primary particle size nm 7 Tapped density (approx. value)* acc. to DIN EN ISO 787/11, Aug. 1983 g/l approx. 50 Moisture* 2 hours at 105°C wt.% < 1.5 Ignition loss 2 hours at 1000°C based on material dried for 2 hours at 105°C wt.% < 2.0 pH in 4% dispersion 3.7 - 4.7 SiO2 - content based on ignited material wt.% > 99.8 * ex plant The data represents typical values and not production parameters.