Overview
HJSIL 300 is a hydrophilic fumed silica supplied as a high-purity white colloidal powder with a nominal BET surface area of 300 m²/g. Its native silanol surface provides thickening, thixotropy, and reinforcement across silicone rubber, adhesive, sealant, coating, and cosmetic applications.
Technical Specifications
| Property | Unit | Value | Standard |
|---|---|---|---|
| Specific surface area (BET) | m²/g | 300 ± 25 | GB/T10722 |
| pH value (4% dispersion) | — | 3.6–4.5 | GB/T1717 |
| Loss on drying (105°C, 2 hrs) | Wt% | ≤1.5 | GB/T5211.3 |
| Loss on ignition (1000°C, 2 hrs) | Wt% | ≤2.5 | GB/T20020 |
| Sieve residue (45 μm) | % | ≤0.05 | GB/T5211.14 |
| Silica content | Wt% | ≥99.8 | GB/T20020 |
| Tamped density | g/L | 40–60 | GB/T5211.4 |
| Carbon content | Wt% | ≤0.2 | GB/T20020 |
| Appearance | — | Lightweight, fluffy white powder | — |
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Applications
- HTV and RTV silicone rubber
- Adhesives and sealants
- Paints and coatings
- Cosmetics
- Liquid Silicone Rubber (LSR)
- Silicone sealant and adhesives
Packaging & Storage
Supplied in 10 kg kraft paper bags. Store in closed containers under dry conditions, protected from volatile substances.
Lead time: 10 days.
Related Products
- HJSIL® Fumed Silica
- HJSIL 200 — 200 m²/g hydrophilic fumed silica
- HJSIL 380 — 380 m²/g hydrophilic fumed silica
Next step
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