Evonik Sipernat 266 is a hydrophilic milled precipitated silica imported from Germany. Designed for silicone rubber systems, it offers balanced particle size and absorption, efficiently reinforcing HTV/LSR/RTV‑2C, stabilizing rheology and viscosity, and serving as carrier, anti‑caking and antiblocking agent.
Balanced particle & absorption - Suitable for reinforcement and carrier applications
High-efficiency silicone reinforcement - Improves tensile, tear strength and wear resistance
Stable rheology & viscosity - Controls flow and extends processing window
Fine grinding & easy dispersion - Uniform dispersion without agglomeration
Multi-purpose versatility - Used as carrier, anti-caking, antiblocking and functional filler
HTV silicone rubber - Reinforcement & viscosity stabilization
LSR silicone rubber - Enhanced mechanical properties & flow
RTV‑2C silicone rubber - Higher strength & longer pot life
Powder industry carrier - Liquid loading, anti-caking & flow aid
Film & plastic antiblocking - Prevent blocking & improve handling
| Product Type | Hydrophilic milled precipitated silica |
| Appearance | White powder |
| BET Surface Area | 145–175 m²/g |
| Median Particle Size D50 | 10.5–14.5 μm |
| Oil Absorption (DOA) | 210–240 mL/100g |
| pH Value | 6.0–8.0 |
| Loss on Drying | ≤7.0% |
| SiO₂ Content | ≥98% |
| CAS No. | 112926-00-8 / 7631-86-9 |
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