Alfa Chemistry is a trusted leader in the research, development, and production of organic silicon materials, offering a comprehensive portfolio of hydrophobic fumed silica products. These advanced materials are produced through a chemical reaction between hydrophilic silica and active silanes or silicone fluids, such as chlorosilanes, hexamethyldisilazane, and polydimethylsiloxane. The resulting hydrophobic fumed silica powder exhibits excellent water repellency, ensuring it remains insoluble in water. Our hydrophobic fumed silica delivers exceptional thixotropic properties in polar adhesives and sealants, including isocyanate resins, epoxy resins, silicone resins, polyurethane resins, and vinyl ester resins. Notably, it enhances the performance of silicone-based systems without excessive thickening. Additionally, its water resistance and ability to improve the flowability of powders make it invaluable for moisture-sensitive formulations. Moreover, our hydrophobic fumed silica offers superior storage stability and processability, and is widely employed as an anti-settling and anti-sagging agent for pigments, making it a versatile choice for various industrial applications.
Hydrophobic Fumed Silica
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Hydrophobic Fumed Silica
Our Products
| Catalog | ALOS-BFS-001 | ALOS-BFS-002 | ALOS-BFS-003 | ALOS-BFS-004 | ALOS-BFS-005 | ALOS-BFS-006 | ALOS-BFS-007 | ALOS-BFS-008 | ALOS-BFS-009 |
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| Description | It is a hydrophobic fumed silica treated with polydimethylsiloxane. | It is a hydrophobic fumed silica treated with DDS (Dimethyldichloro silane) | It is a hydrophobic fumed silica treated with DDS (Dimethyldichloro silane) | It is a hydrophobic fumed silica treated with HMDS (Hexamethyldisilazane) | It is a hydrophobic fumed silica treated with HMDS (Hexamethyldisilazane) | It is a hydrophobic fumed silica treated with HMDS (Hexamethyldisilazane). | It is a hydrophobic fumed silica treated with HMDS (Hexamethyldisilazane) | It is a hydrophobic fumed silica treated with HMDS (Hexamethyldisilazane). | It is a hydrophobic fumed silica treated with HMDS (Hexamethyldisilazane) |
| CAS No. | 67762-90-7 | 68611-44-9 | 68611-44-9 | 68909-20-6 | 68909-20-6 | 68909-20-6 | 68909-20-6 | 68909-20-6 | 68909-20-6 |
| Specific Surface Area (BET) | 95-125 m2/g | 100-130 m2/g | 150-190 m2/g | 105-135 m2/g | 115±15 m2/g | 140-180 m2/g | 170±20 m2/g | 180-240 m2/g | 260±25 m2/g |
| SiO2 Content, wt.% (1000 °C, 2h) | Min. 99.8 | Min. 99.8 | Min. 99.8 | Min. 99.8 | Min. 99.8 | Min. 99.8 | Min. 99.8 | Min. 99.8 | Min. 99.8 |
| Loss on Drying, wt.% (105 °C, 2h) | Max.1.5 | Max. 0.7 | Max. 0.7 | Max. 0.5 | Max.0.7 | Max.0.5 | Max.0.5 | Max.0.5 | Max.0.5 |
| Loss on Ignition, wt.% (1000 °C, 2h) | Max.10 | Max. 2.5 | Max. 2.5 | Max. 4.0 | Max.2.0 | Max.4.0 | Max.4.0 | Max.8.0 | Max.4.0 |
| pH Value (in 4 % aqueous dispersion) | 5.5-7.5 | 3.7-4.5 | 3.7-4.5 | 5.5-7.5 | 5.5-7.5 | 7.0-8.5 | 5.5-8.0 | 7.0-8.5 | 5.5-8.0 |
| Tamped Density, g/L (2h at 105 °C) | - | 40-60 | 40-60 | 40-60 | 40-60 | - | 40-60 | - | 40-60 |
| Carbon Content, wt.% (2h at 105 °C) | 4.5-6.5 | 0.6-1.2 | 0.7-1.3 | 1.0-2.0 | 1.0-2.0 | 1.5-3.5 | 1.5-3.5 | 3.5-6.5 | 2.5-4.0 |
Applications
| ALOS-BFS-001 |
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|---|---|
| ALOS-BFS-002 |
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| ALOS-BFS-003 |
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| ALOS-BFS-004 |
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| ALOS-BFS-005 |
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| ALOS-BFS-006 |
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| ALOS-BFS-007 |
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| ALOS-BFS-008 |
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| ALOS-BFS-009 |
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Packaging
Available in 10 kg bags. Customized packaging can be arranged based on customer requirements.
Storage and Shelf Life
Store the product in a cool, dry place in sealed packaging. The shelf life is 24 months under proper storage conditions.
If you can't find the specific product you're looking for, we are happy to provide customized solutions tailored to your requirements. Our expert team is dedicated to working closely with you to develop the perfect product that fits your unique application.
