Hydrophobic Fumed Silica is a modified form of Fumed Silica that has been treated to repel water. This hydrophobic property
provides several benefits in various applications. Some of the key benefits of hydrophobic fumed silica include:
1. Improved water resistance: Hydrophobic fumed silica is highly effective in repelling water and preventing moisture absorption.
This property makes it ideal for applications where water resistance is crucial, such as coatings, sealants, and adhesives.
2. Enhanced rheological properties: Hydrophobic fumed silica can significantly improve the rheological properties of various
materials, including viscosity, thixotropy, and sag resistance. It helps in achieving the desired flow and stability characteristics
in paints, inks, and other formulations.
3. Increased stability: The hydrophobic surface of fumed silica prevents agglomeration and maintains particle dispersion, resulting
in improved stability and shelf life of the end products. This is particularly beneficial in formulations where long-term stability is
essential, such as cosmetics and personal care products.
4. Improved insulation properties: Hydrophobic fumed silica has excellent insulating properties, making it suitable for applications
in the electrical and electronics industry. It can be used as a filler in insulation materials to enhance their thermal and electrical
insulation performance.
5. Reinforcement of elastomers: Hydrophobic fumed silica can be used as a reinforcing filler in elastomers, such as rubber and
silicone. It improves the mechanical properties, such as tensile strength, tear resistance, and abrasion resistance, resulting in more durable and high-performance elastomeric products.
6. Anti-settling and anti-sagging effects: The hydrophobic nature of fumed silica helps in preventing settling and sagging of particles
in suspensions and thixotropic systems. This property ensures uniform distribution and prevents sedimentation, resulting in improved product performance and appearance.
7. Improved scratch resistance: When used in coatings and paints, hydrophobic fumed silica can enhance scratch resistance,
providing a protective barrier against damage and wear. This makes it suitable for applications where surface durability is important,
such as automotive coatings.
Overall, the hydrophobic properties of fumed silica offer a wide range of benefits, including improved water resistance, enhanced rheological properties, increased stability, improved insulation, reinforcement of elastomers, anti-settling effects, and improved scratch resistance. These benefits make hydrophobic fumed silica a valuable additive in various industries and applications.
Physical and Chemical Data
| Property | Unit | Typical Value | | Specific Surface Area(BET) | m2/g | 170±20 | | PH Value in 4% Dispersion | / | 5.5-8.0 | | Moisture (2 hours at 105℃) | wt% | ≤0.5 | | Loss on ignition(2h at 1000℃,based on material dried for 2h at 105℃) | wt% | ≤4.0 | | Sio2 Content(Based on ignited material) | wt% | ≥99.8 | | Carbon content(based on material dried for 2h at 105℃) | wt% | 1.5-2.5 |
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Anticorrosion Pigments,
Inkjet Receptive Coating,
Matting Agent
