Fumed silica, also known as pyrogenic silica because it is produced in a flame, consists of microscopic droplets of amorphous silica fused into branched, chainlike, three-dimensional secondary particles which then agglomerate into tertiary particles. The resulting powder has an extremely low bulk density and high surface area. Its three-dimensional structure results in viscosity-increasing, thixotropic behavior when used as a thickener or reinforcing filler.
Rheology and thixotropy control of liquids, binders, polymers, etc.
AEROSIL® grade with the highest surface area resulting in best thickening and thixotropy
Reinforcement of HTV-silicone rubber
Excellent transparency in unsaturated polyester resins
Flow aid