The investment will expand the company’s annual capacity for hydrophilic fumed silica at the existing Rheinfelden site by 20% to meet heavy market demand.
Hydrophobic fumed silica, which Evonik markets under the brand name Aerosil, has low moisture absorption and excellent dispersibility, according to Evonik. It is used for rheology control and as an anti-settling agent in coating systems, adhesive and sealant materials and as a thickener and anti-caking agent in silicone rubber, toners and cosmetics.
“Rheinfelden is the parent plant for our hydrophobic fumed silicas. We decided in favor of expanding the site because the investment will help us make even better use of existing facilities. In addition, the local process know-how and specific long-term experience with the construction and operation of the plants were essential considerations for us,” said Andreas Fischer, head of the silica business line.