Fumed Silica for Adhesives and Sealants (Hydrophilic)
Hydrophilic fumed silica is a high-purity, nanoscale amorphous silicon dioxide produced by flame hydrolysis, widely used as a thixotropic agent and reinforcing filler in adhesives and sealants. Its very high surface area (150–380 m²/g) and surface hydroxyl groups form a hydrogen-bond network that imparts thixotropy, prevents sag, and reinforces the cured adhesive. It is the primary rheology modifier for epoxy, polyurethane, silicone, and acrylic adhesive and sealant systems.
Teknik Özellikler
| appearance | White fluffy powder |
| moistureContent | ≤1.5% |
| BET surface area | 150–380 m²/g (grade dependent) |
| pH (4% dispersion) | 3.7–4.5 |
| averagePrimaryParticleSize | 7–40 nm |
Uygulama Alanları
- Thixotropic agent in epoxy and PU adhesives
- Anti-sag additive in construction sealants
- Reinforcing filler in silicone sealants
- Thickener in acrylic and MS polymer adhesives
- Free-flow agent for powder adhesive systems
Ürün Özellikleri
- Excellent thixotropy—prevents sag on vertical surfaces
- Reinforces cured adhesive strength and tear resistance
- Compatible with all major adhesive polymer systems
- Multiple grades covering surface areas 150–380 m²/g