Evonik Sipernat 238 is a medium particle size, medium absorption precipitated silica imported from Germany. It reinforces HTV, LSR, RTV‑2C silicone rubber, stabilizes viscosity, and provides excellent dispersion and processability for special carrier applications.
Balanced particle & absorption - Suitable for both reinforcement and carrier use
Efficient silicone reinforcement - Improves tensile, tear strength and wear resistance
Stable viscosity control - Stabilizes compound viscosity and extends processing time
Easy dispersion & mixing - Finely ground, uniform dispersion without agglomeration
High purity & low impurity - Stable quality for high‑end silicone application
HTV silicone rubber: Reinforcement, viscosity stabilization for seals and rubber rollers
LSR silicone rubber: Improved mechanical properties and fluidity for precision silicone products
RTV-2C silicone rubber: Strength enhancement and longer pot life for potting and sealing
Special carrier systems: Stable loading for active ingredients in chemical and pharmaceutical fields
Translucent silicone products: Achieve translucent and low-yellowing appearance
| Product Type | Finely ground synthetic precipitated silica |
| Appearance | White powder |
| BET Surface Area | 180–220 m²/g |
| Median Particle Size D50 | 9–13 μm |
| Oil Absorption | 190–230 mL/100g |
| pH Value | 6.0–8.0 (Neutral) |
| Loss on Drying | ≤7.0% |
| SiO₂ Content | ≥98% |
| CAS No. | 112926-00-8 |
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