Evonik AEROSIL R805 is a hydrophobic fumed silica imported from Germany, based on A200 modified with octylsilane. Designed for rheology control in complex liquid systems, it features strong hydrophobicity, high dispersion, anti-settling and anti-corrosion, widely used in coatings, adhesives, powder coatings and other high-end systems.
Octylsilane hydrophobic modification - Uniform surface modification, stable hydrophobicity, suitable for strong polar and complex chemical systems
Efficient rheology control - Precisely adjust thixotropy in complex liquid systems such as two-component epoxy, anti-sagging and anti-settling
Pigment stabilization and enhancement - Improve pigment dispersion and storage stability, enhance coating anti-corrosion and weather resistance
Powder coating flow aid - Improve powder fluidity, prevent caking, enhance spraying uniformity and powder transfer efficiency
High purity and low impurity - SiO₂ content ≥99.8%, stable batch, compatible with various resins
Two-component epoxy coatings - Rheology control for complex systems, anti-sagging, anti-settling, improve anti-corrosion and appearance
Industrial coatings and topcoats - Improve pigment stability, workability, weather resistance and anti-corrosion
Adhesives and sealants - Optimize thixotropy, prevent sagging, improve bonding strength and water resistance
Powder coatings - Used as flow aid, improve fluidity and spraying efficiency
Unsaturated resin systems - Enhance thickening effect and system stability, extend pot life
| Brand | Evonik |
| Product Series | AEROSIL Hydrophobic Fumed Silica |
| Product Type | Hydrophobic Fumed Silica |
| Base Material | A200 Hydrophilic Fumed Silica |
| Surface Treatment | Octylsilane |
| BET Surface Area | 150±25 m²/g |
| Bulk Density | Approx. 50 g/L |
| Carbon Content | 4.5–6.5 wt% |
| Moisture Content | ≤0.5 wt% |
| Loss on Ignition | 5.0–7.0 wt% |
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