Precipitated silica is an amorphous silicon dioxide powder produced through a wet chemical precipitation process. It features high porosity, large surface area, and low bulk density, making it ideal for a variety of industrial uses — including tires, plastics, coatings, agrochemicals, toothpaste, and animal feed.
Production Method: Wet Precipitation
KosNature manufactures precipitated silica using a controlled chemical process:
Basic Reaction:
Na₂SiO₃ (Sodium Silicate) + H₂SO₄ (Sulfuric Acid) → SiO₂ (precipitated) + Na₂SO₄ + H₂O
Process steps include:
- pH Control
- Reaction temperature & dosing rate optimization
- Gel aging, filtration, and drying (e.g., spray drying)
- Particle size and structure adjustment via milling
This process ensures consistent product quality and allows for specification customization.
Key Product Characteristics
| Property | Description |
|---|---|
| Appearance | White amorphous powder |
| Oil Absorption | 150–300 ml/100g |
| BET Surface Area | 100–300 m²/g |
| Bulk Density | 0.05–0.30 g/cm³ |
| Particle Size (D50) | 3–25 μm (adjustable) |
| pH (5% solution) | 5.5–7.5 (adjustable) |
| Moisture Absorption | High, can be hydrophilic or modified |
| Chemical Behavior | Inert, non-toxic, odorless |
Applications
🛞 Rubber & Tire Manufacturing
- High reinforcement for tread compounds
- Improves wet grip and rolling resistance
- Replaces carbon black in non-marking applications
🧴 Plastics & Composites
- Enhances dimensional stability and rigidity
- Anti-blocking and matting for thermoplastics
- Used in PVC, PE, PP compound formulations
🎨 Paints, Coatings & Inks
- Provides thickening, anti-settling, and matting
- Improves abrasion resistance and suspension
As a leading precipitated silica manufacturer, KosNature offers high-purity, customizable solutions for global tire, plastic, and coating industries.
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