Leveraging advanced thermo-mechanical properties, Wacker HDK N20P is a mechanically densified hydrophilic fumed silica with 175-225 m²/g surface area and ≥99.8% SiO₂ purity. Its compressed white powder form (100 g/L bulk density, 150% higher than N20) reduces dust emission by 70%, ideal for electronic encapsulation and high-performance coatings with pH 3.8-4.3
Density Advantage: 50% smaller packaging volume cuts logistics costs by 40%
Thixotropic Control: 1-3% dosage in epoxy achieves thixotropic index 3.5 (ASTM D2196), +60% anti-sagging
Low-Dust Process: 70% less airborne particles for cleanroom compliance
Broad Compatibility: Stable in solvent/solvent-free systems with silicones/PU
Long-Term Stability: No caking after 24 months at 50℃, <1.5% ignition loss
Electronic Encapsulation: Eliminates voids in high-viscosity epoxy (>100,000 mPa·s), thermal conductivity ≥0.8 W/m·K
Industrial Coatings: Powder coating flow aid (0.5-1.5%), +20% spraying efficiency
Adhesives: UV-curable glue thixotropy, +30% shear strength
Composites: Prevents settling in CFRP prepreg, 95% fiber uniformity
Chemical Type | Hydrophilic fumed silica |
Appearance | White nano powder |
Surface Area (BET) | 175-225 m²/g |
Primary Particle Size | 7-40 nm |
Bulk Density | 100 g/L |
SiO2 Content | ≥99.8% |
pH (4% aqueous) | 3.8-4.3 |
Ignition Loss (1000℃) | <1.5% |
Moisture Content | <1.5% |
Packaging | 20kg/moisture-proof bag (pallet) |
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China