SemiSIL 150: Hydrophilic Fumed Silica 150
SemiSIL 150 is a high-performance hydrophilic fumed silica 150 specifically engineered for maximum dispersibility and high filler loading. As a premier hydrophilic fumed silica 150, it allows for significantly higher addition rates without excessive viscosity build-up.
Quick Profile
- Surface Area (BET): 150 ± 25 m²/g
- Composition: SiO₂ ≥ 99.8%
- CAS Number: 112945-52-5
- Key Advantage: Lowest viscosity impact & Rapid dispersion.
Industries & Applications of Hydrophilic Fumed Silica 150
- Defoamers: Excellent carrier for active components with minimal thickening.
- RTV Silicone Sealants: Allows for higher loading capacity to optimize formula costs.
- Powder Coatings: Superior anti-caking and free-flow enhancement.
- PVC & Plastics: Improvement of mechanical properties and processing flow.
Key Functional Properties of SemiSIL 150
Low Viscosity Build
With a 150 m²/g surface area, it provides minimal viscosity increase, allowing for high loading in liquid systems.
Rapid Dispersion
Engineered for easy integration into polymer matrices with lower shear requirements compared to 200+ grades.
Free-Flow Power
An exceptional anti-caking agent that maintains powder fluidity and prevents clumping during long-term storage.
Processing Consistency
Ensures stable extrusion rates in RTV silicone sealants and uniform texture in defoamer formulations.
Chemical Integrity
SiO2 ≥ 99.8%: High purity, non-toxic, and ultra-stable, ensuring no unwanted side reactions in sensitive formulas.
Technical Data (TDS)
| Property | Standard Value | Unit | Method |
|---|---|---|---|
| Specific Surface Area | 150 ± 25 | m²/g | GB/T 20020 |
| pH (4% dispersion) | 3.6 ~ 4.5 | - | GB/T 20020 |
| Loss on Drying | ≤ 1.5 | % | GB/T 20020 |
| SiO₂ Content | ≥ 99.8 | % | GB/T 20020 |
Packaging & Logistics
Non-DG Compliance: Fully safe for Railway, Sea (Shipping), and Truck transportation.
20'FCL Loading
• 180kg / pallet (18 bags)
• 10 pallets / 1800kg total
• 10 pallets / 1800kg total
40'HQ Loading
• 220kg / pallet (22 bags)
• 20 pallets / 4400kg total
• 20 pallets / 4400kg total
Maximal 40'HQ Combined Loading
• 4400kg Palletized (220kg x 20 pallets)
• 400kg Loose bags without pallets
• 4800kg Total Loading Capacity
• 400kg Loose bags without pallets
• 4800kg Total Loading Capacity
Common Questions about SemiSIL 150
Is SemiSIL 150 a direct drop-in replacement for Aerosil® 150 or HDK® V15?
Yes. SemiSIL 150 is a 1:1 technical equivalent to standard hydrophilic fumed silica with 150 m²/g surface area. It matches the critical parameters for RTV silicones and defoamers, allowing for a seamless transition to a factory-direct supply without re-engineering your current process.
When should I choose SemiSIL 150 over the standard 200 grade?
Choose SemiSIL 150 if your formula requires higher loading capacity or if you have limited high-shear mixing equipment. Because of its lower surface area, it builds viscosity more slowly than SemiSIL 200, allowing you to incorporate more silica into the system while maintaining excellent flow and extrusion properties.
How does SemiSIL 150 improve dispersion speed in liquid resins?
SemiSIL 150 features larger primary particles compared to higher surface area grades, which reduces the energy required to break down agglomerates. This leads to shorter mixing cycles and reduced "dusting" issues during the initial wetting phase, significantly improving production throughput.
Is SemiSIL 150 effective as an anti-caking agent for powders?
Extremely. SemiSIL 150 is a top-tier choice for powder free-flow. It coats larger particles effectively to prevent moisture bridging and clumping. It is widely used in fire extinguishing powders, powder coatings, and agricultural chemicals to ensure consistent pouring and spraying performance.
What are the storage requirements to prevent clumping of the silica itself?
Like all hydrophilic grades, SemiSIL 150 must be kept dry. However, its lower surface area makes it slightly less sensitive to humidity than 300+ grades. It should be stored in a cool, dry area in its original 10kg bags. The guaranteed shelf life is 24 months when kept away from direct moisture and volatile organic compounds.
Factory-Direct fumed silica 150
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