Redefining Industry Standards
fumed silica
Rahul Overseas is a trusted supplier of high-performance Fumed Silica, catering to a wide range of industries. Our Fumed Silica enhances rheological properties, thickens formulations, and improves mechanical strength in paints, coatings, adhesives, and sealants. It is also widely used in the construction, pharmaceutical, and chemical sectors for its excellent dispersion, anti-sagging, and reinforcement properties.
Silica quartz is the backbone of the optical fiber industry, serving as the core material for manufacturing optical fibers used in telecommunications, data transmission, and fiber optic sensing applications. Its exceptional optical transparency, low attenuation, and mechanical strength make it the preferred material for transmitting light signals over long distances with minimal signal loss.
Fumed silica, also known as pyrogenic silica, is widely used in the paint industry for several key reasons:
1. Rheology Control: Fumed silica is used as a thixotropic agent to control the viscosity and flow properties of paint. This helps in preventing sagging and dripping during application, ensuring a smooth finish.
2. Anti-Settling Agent: It helps in keeping the pigments and other solid components uniformly dispersed within the paint. This prevents the components from settling at the bottom of the container, which is crucial for maintaining consistent quality and ease of application.
3. Improved Stability: Fumed silica enhances the stability of the paint formulation, increasing its shelf life by preventing the separation of components.
4. Enhanced Mechanical Properties: It improves the mechanical properties of the paint film, such as hardness, scratch resistance, and durability. This makes the paint more resistant to wear and tear.
5. Matting Agent: Fumed silica can be used to achieve a matte finish in paints and coatings by diffusing light and reducing gloss.
6. Anti-Sagging: In thick coatings, especially vertical surfaces, fumed silica helps in preventing the paint from sagging or running.
7. Improved Surface Properties: It can enhance the surface properties of the paint, such as smoothness and uniformity, contributing to a better aesthetic finish.
Overall, fumed silica is a versatile additive that improves the performance, application, and durability of paints and coatings, making it an essential component in the paint industry.
| Elements | Composition |
| Silicon Dioxide (SiO₂) | 99.8% minimum |
| Aluminum Oxide (Al₂O₃) | 0.05% maximum |
| Iron Oxide (Fe₂O₃) | 0.003% maximum |
| Loss on Ignition (LOI) | 1.5% maximum |
Moisture Content :
As Shipped : 0.5% maximum
Loss on Drying :
At 105°C : 0.5% maximum
Packaging :
Typically available in 10 kg and 20 kg bags, or customized packaging as per requirement
Storage :
Should be stored in a cool, dry place away from moisture. Keep the container tightly closed when not in use.
These specifications are a general guideline and can vary slightly depending on the manufacturer. Always refer to the product’s technical data sheet provided by the supplier for precise information.
Applications:
- Thixotropic agent in paints, coatings, and adhesives
- Anti-settling agent in various formulations
- Reinforcement in silicone rubber and other composites
- Free-flow aid in powders and granulated products
- Matting agent for reducing gloss
| Elements | Composition |
| Appearance | White, fluffy powder |
| Surface Area (BET) | 200 ± 25 m²/g |
| Particle Size | 7-40 nm (primary particle size) |
| Bulk Density | 30-60 g/L (tapped) |
| pH (in 4% dispersion) | 3.7 - 4.5 |