myTechnical Documents
Hydrophilic fumed silica. Acts as an anti-settling, thickening and anti-sagging agent. Used in adhesives and sealants.
Details
CAS
945-52-5 112 ;7631-86-9
Recommended for
Producer
Supplier
Chemical Composition
Hydrophilic Fumed Silica
Advantages
- Rheology and thixotropy control of liquid systems, binders, polymers, etc
- Reinforcement of HTV-, LSR- and RTV-2K silicone rubberImprovement of free flow and anticaking characteristics of powders
Other Applications
Paints and coatings
Unsaturated polyester resins, laminating resins and gel coats
HTV-, LSR- and RTV-2K-silicone rubber
Adhesives and sealants
Printing inks
Cable compounds and cable gels
Plant protection
Used as anti-settling, thickening and anti-sagging agent
Storage
We recommend to store the product in closed containers under dry conditions and to protect the material from volatile substances. AEROSIL® 255 should be used within 2 years after production.
Handling
Complies with REACH, TSCA (USA), DSL (Canada), AICS (Australia), KECI (Korea), ENCS (Japan) and IECS (China).
Technical data
| Quantity | Value | Unit | Comment |
|---|---|---|---|
| Appearance Properties | |||
| Appearance | White | ||
| Physical state | |||
| Physical Properties | |||
| Humidity | <1.5 | % | 2hours at 105°C |
| Surface Area | 220 - 280 | m²/g | BET |
| Tap density | 0.05 | g/cm3 | ex plant, acc. to DIN EN ISO 787/11, Aug. 1983 |
| SiO2 | >99 | % | based on ignited material |
| pH | 3.7 - 4.5 | in 4% dispersion | |
| Density | g/ml | 20°C | |
| Thermal Properties | |||
| Melting point | ºC | ||
| Loss on ignition | <1.5 | % | 2hours at 1000°C based on material dried for 2 hours at 105° |
| Chemical Properties | |||
| Loss on drying | <1.5 | % | 2hours at 105°C |