Hydrophobic fumed SiO2 refers to silicon dioxide particles that have been treated to become hydrophobic, or water-repellent.
Fumed Silica is a type of amorphous silicon dioxide that is produced by burning silicon tetrachloride in a hydrogen-oxygen flame.
The resulting silica particles are extremely small, with a high surface area and unique properties.
Hydrophobic Fumed Silica is a type of silica dioxide that has been treated with a hydrophobic (water-repelling) coating. This coating
alters the surface properties of the silica particles, making them highly water-repellent and preventing them from absorbing or
interacting with water.
Hydrophobic fumed silica is commonly used as an additive in various industries and applications where water repellency is desired.
Some of its uses include:
1. Coatings and paints: Hydrophobic fumed silica can be added to coatings and paints to improve their water resistance and prevent moisture penetration. It helps to create a barrier that repels water and protects the underlying surface.
2. Adhesives and sealants: Hydrophobic fumed silica is often used in adhesives and sealants to enhance their water resistance and improve their bonding properties. It helps to prevent water from weakening or degrading the adhesive bond.
3. Cosmetics and personal care products: Hydrophobic fumed silica is used in cosmetics and personal care products such as lotions, creams, and sunscreens. It helps to improve the spreadability, texture, and water resistance of these products.
4. Pharmaceuticals: Hydrophobic fumed silica is sometimes used in pharmaceutical formulations to improve drug delivery and stability.
It can help to enhance the dissolution and bioavailability of poorly soluble drugs.
5. Food and beverages: Hydrophobic fumed silica is used in the food and beverage industry as an anti-caking agent and a flow aid. It helps to prevent clumping and improve the flowability of powdered or granulated products.
Overall, hydrophobic fumed silica provides excellent water repellency and can be a valuable additive in various industries and applications where moisture resistance is important.
Physical and Chemical Data
| Property | Unit | Typical Value | | Specific Surface Area(BET) | m2/g | 210±30 | | PH Value in 4% Dispersion | / | 7.0-8.5 | | Moisture (2 hours at 105℃) | wt% | ≤0.5 | | Loss on ignition(2h at 1000℃,based on material dried for 2h at 105℃) | wt% | ≤8.0 | | Sio2 Content(Based on ignited material) | wt% | ≥99.8 | | Carbon content(based on material dried for 2h at 105℃) | wt% | 3.5-6.5 |
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Anticorrosion Pigments, Inkjet Receptive Coating, Matting Agent
