Precipitated Silica VN3 (Tire Grade)
CAS Number: 112926-00-8
Precipitated Silica VN3 is a highly dispersible silica (HDS) developed specifically for use in green tire tread compounds where it replaces or partially replaces carbon black to achieve the simultaneous improvement of rolling resistance, wet grip, and wear resistance — the "magic triangle" of tire performance. When coupled with bis-TESPD or bis-TESPS silane, VN3 forms strong silica-polymer bonds that deliver significantly lower hysteresis and fuel economy benefits compared to carbon black-filled treads.
Technical Specifications
| appearance | White powder or granules |
| moisture (%) | ≤7.0 |
| SiO2 content (%) | ≥97 |
| pH (5% suspension) | 6.0–7.5 |
| BET surface area (m²/g) | 175±15 |
| DBP absorption (mL/100g) | 195±20 |
| CTAB surface area (m²/g) | 165±15 |
Applications
- Green tire tread compounds (silica-silane technology)
- High-performance and UHP tire treads
- Winter and all-season tire treads
- Silica-filled NR/SBR/BR tread blends
- Low rolling resistance truck tire treads
Key Features
- Highly dispersible silica for "magic triangle" tire performance
- Enables 5–7% fuel economy improvement vs carbon black treads
- Superior wet grip and winter traction
- Requires silane coupling agent for optimal polymer-filler bonding
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CAS Number
112926-00-8
Category
Rubber / Tire ChemicalsAvailability
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