Shanghai Semitech New Material Co., Ltd.
1628 Lijing Road, Lingang New Area, 200000, Shanghai, China.
Mobile:
+8615639100440
Email:
info@semitechnm.com
High-Performance Silica Additives
SemiSIL® Fumed Silica Series
Bottom Line Up Front: SemiSIL® Fumed Silica is an industrial-grade rheology modifier and reinforcing filler with a guaranteed SiO₂ content of ≥99.8%. By engineering BET surface areas from 150 to 400 m²/g, it provides absolute viscosity control for liquid coatings and up to 40x tensile strength reinforcement for silicone elastomers.
Technical Grade Selection Matrix
Select the optimal hydrophilic or hydrophobic grade based on your resin system's polarity and viscosity requirements.
| Grade / Model | Surface Property | BET Area (m²/g) | Carbon Content | Recommended Application |
|---|---|---|---|---|
| SEMISIL 150 | Hydrophilic | 150 ± 20 | - | RTV Silicone Rubber, Coatings, PVC |
| SEMISIL 200 | Hydrophilic | 200 ± 20 | - | RTV Silicone, Adhesives, Paints |
| SEMISIL 300 | Hydrophilic | 300 ± 20 | - | HTV Silicone Rubber, Defoamers, Resins |
| SEMISIL 380 | Hydrophilic | 380 ± 20 | - | LSR, Gel Coats, Specialty Greases |
| SEMISIL R110 | Hydrophobic | 100 ± 20 | 3.5 - 5.5% | Moisture-sensitive RTV, Advanced Coatings |
| SEMISIL R272 | Hydrophobic | 110 ± 20 | 0.6 - 1.2% | Printing Inks, Industrial Adhesives |
| SEMISIL R620 | Hydrophobic | 260 ± 30 | 2.8 - 4.0% | Liquid Coatings, Pharmaceutical Excipients |
Industrial Applications
Delivering high-performance rheology and mechanical reinforcement across core industries.
Coatings & Paints
Optimizing surface integrity, adhesion, and suspension stability for high-performance coating systems.
- Rheological Precision:
- Prevents pigment settling and phase separation.
- Anti-Sagging:
- Eliminates paint runoff on vertical surfaces.
- Surface Fortification:
- Enhances scratch resistance and weatherability.
- Adhesion Promotion:
- Strengthens bonding between films and substrates.
Silicone Rubber (HTV/LSR)
Enhancing structural integrity and thermal stability via advanced 3D silica networking.
- Molecular Networking:
- Si-OH groups bond with macromolecules for 3D reinforcement.
- Mechanical Boost:
- Increases base rubber strength by 40x (tensile/tear).
- Dynamic Resilience:
- Improves hardness while maintaining elasticity.
- Thermal Protection:
- Bolsters heat resistance and dielectric properties.
Printing Inks
Optimizes rheology and drying speed for precise imaging on high-speed substrates.
- Optical Enhancement:
- Maximizes brightness and color density.
- Dispersion Stability:
- Controls anti-settling for long storage life.
- Precision Rheology:
- Ensures sharp contours and streak-free flow.
Pharmaceuticals
Enhances solid dosage consistency and liquid formulation stability.
- Improved Flowability:
- Optimizes powder flow for precise manufacturing.
- Anti-Adherent Action:
- Prevents tablet sticking and ensures mold release.
- Formulation Stability:
- Stabilizes emulsions and suspensions.
Logistics & Loading Specs
Standardized vacuum packaging (10kg/bag) designed for maximum freight efficiency.
| Transport Mode | Pallet Configuration | Total Bags (10kg) | Total Net Weight |
|---|---|---|---|
| Domestic Truck (17.5m) | Full Truckload (FTL) | 880 Bags | 8.8 Tons |
| 20' Container (Ocean) | 10 Pallets (180kg/pallet) | 180 Bags | 1.8 Tons |
| 40' High Cube | 20 Pallets (220kg/pallet) | 440 Bags | 4.4 Tons |
| 40' High Cube (Max Vol) | 20 Pallets + Loose Bags | 480 Bags | 4.8 Tons |
Global Delivery Lead Times
- Port Preparation Time
- Ready at Qingdao Port within 3 days.
- Total Origin Lead Time
- From order confirmation to departure: 3 to 7 days.
- SE Asia Vessel Frequency
- 3 to 4 departures per week.
- EU / Middle East Frequency
- 1 departure per week.
Knowledge Base & FAQs
Q1: How to choose between Hydrophilic and Hydrophobic silica?
A: Use hydrophilic silica for polar systems and hydrophobic silica for non-polar systems. Hydrophilic grades provide maximum thickening through hydrogen bonding in polar media (like water-borne coatings). Hydrophobic grades (e.g., SemiSIL R620) are surface-treated to contain a carbon content of 0.6% - 5.5%, making them essential in moisture-sensitive formulations like epoxy or silicone resins to prevent viscosity drift.
Q2: What is the optimal dosage for anti-sagging?
A: Typically 0.5% to 2.0% by total weight. At this concentration, the particles form a stable 3D thixotropic network that counteracts gravity on vertical surfaces.
Q3: How much can it increase silicone rubber tensile strength?
A: It can increase tensile and tear strength by up to 40 times. By utilizing grades with a BET surface area of 300 ± 20 m²/g, the Si-OH groups create dense molecular cross-linking with raw silicone macromolecules.
Q4: What impact does BET surface area have on dispersion energy?
A: Higher BET surface area directly increases the required dispersion energy. High surface area grades (e.g., 380 m²/g) require high-shear equipment operating at a peripheral speed of 10-15 m/s to fully develop the rheological network.
Ready to Optimize Your Formulation?
Request Technical Data Sheets (TDS), Safety Data Sheets (MSDS), or free laboratory testing samples. Our engineering team provides technical response within 24 hours.
Contact Engineering Team