Due to its specific properties, AEROSIL® fumed silica performs in a multitude of applications in the adhesives and sealants industry. Both hydrophilic and hydrophobic types of AEROSIL® fumed silica are mainly used as additives for thixotropy, reinforcement, anti-settling, rheology control and anti-sag in reactive, solvent, water-based adhesives and hotmelts.
In sealants, AEROSIL® fumed silica is used especially as rheology control and active reinforcing filler, while AEROXIDE® TiO2 P 25 improves the thermal stability. AERODISP® W 7520 is a low viscous, water-based dispersion of AEROSIL® fumed silica which improves shear adhesion and dry film clarity of water-based pressure sensitive adhesives.
AEROSIL® fumed silica offers many technical advantages and effects for adhesive and sealant manufactures:
Thickening and thixotropy