SEMISIL 200 Hydrophilic Fumed Silica
SEMISIL 200 Fumed Silica is a high-purity, hydrophilic synthetic amorphous silica with a specific surface area of 200 m²/g. It is engineered to provide exceptional rheology control, thickening, and anti-settling properties in a wide range of coatings and paints and sealants, ensu
Technical Specifications
| Properties and Test Methods | Unit | Typical Value | Standardization |
|---|---|---|---|
| Specific surface area (BET) | m²/g | 200 ± 25 | GB/T 10722 |
| pH value (in 4% dispersion) | – | 3.6 ~ 4.5 | GB/T 1717 |
| Loss on drying (2h @ 105°C) | Wt% | ≤ 1.5 | GB/T 5211.3 |
| Loss on ignition (2h @ 1000°C, based on dried material) | Wt% | ≤ 2.5 | GB/T 20020 |
| Sieve residue (45 μm) | % | ≤ 0.05 | GB/T 5211.14 |
| Silica content (ignited material) | Wt% | ≥ 99.8 | GB/T 20020 |
| Tamped density (dried material) | g/L | 40 ~ 60 | GB/T 5211.4 |
| Carbon content (dried material) | Wt% | ≤ 0.2 | GB/T 20020 |
Application Suggestions
Silicone Sealants
Acts as a high-performance rheology modifier. It provides exceptional thixotropy and sag resistance in RTV sealants, ensuring long-term stability in vertical joints and construction bonding.
[Coatings & Paints](/applications/fumed-silica-for-coatings-and-paints/)
Engineered for anti-settling and anti-sagging in industrial coatings. It enhances the hydrophobic (water-repellent) barrier of exterior paints, significantly improving film durability and pigment suspension.
Li-ion Batteries
Essential for thermal management and structural safety in electric vehicle batteries. It serves as a specialized additive in electrolyte gels and separator coatings to maintain ionic conductivity while preventing thermal runaway.
Cosmetics
A high-purity thickening and opacifying agent for personal care formulations. It refines the texture of creams and lotions, providing a premium matte finish and improved skin feel.
Food & Pharma
A reliable anti-caking and free-flow agent. It ensures consistent powder flowability and prevents clumping in sensitive pharmaceutical excipients and food-grade powders during storage.
Technical Support & FAQ: SEMISIL 200
+Q1: What are the key features and applications of SEMISIL 200?
SemiSIL 200 Fumed Silica is a high-purity hydrophilic additive designed for:
- Core Functions: Anti-tacking Agent, thixotropy, and anti-settling.
- Key Features: Uniform particle size, exceptional transparency, and chemical purity.
- Primary Applications: Cosmetics, powder coatings, Pharmaceutical Excipient.
+Q2: How does SEMISIL 200 compare with SEMISIL 150, 300 and 380?
The primary distinction is the Specific Surface Area (BET), which determines thickening efficiency and dispersibility:
- SEMISIL 150 (140 – 160 m²/g): Superior dispersibility; ideal for low-viscosity systems.
- SEMISIL 300 (290 – 320 m²/g): Maximum thickening power; requires high-shear dispersion.
- SEMISIL 380 (370 – 390 m²/g): Achieve exceptional optical clarity for liquid silicone rubber (LSR).
+Q3: What factors influence the pricing of SemiSIL 200?
Pricing is driven by market dynamics and technical requirements:
- Production Costs: Raw material (SiCl₄) fluctuations and energy consumption.
- Quality Standards: Strict control of pH stability and Sieve Residue.
- Logistics: Order volume, shipping distance, and vacuum-densified bags.
+Q4: What are the typical lead times and payment terms?
We ensure efficient global supply through professional logistics:
- Lead Time: Typically 7–14 days (Annual supply volume: 15,000 tons).
- Payment Terms: Flexible options including T/T, L/C at sight, and D/P.
- Sample Support: Free samples (200g–1kg) available for R&D; evaluation.
Packing & Storage Information
Storage Conditions
SEMISIL® 200 should be stored in closed containers under dry conditions and protected from volatile substances. The product should be used within 2 years after manufacturing to ensure optimal performance.