Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

WACKER Hydrophilic Fumed Silica HDK V15

Leveraging advanced thermo-mechanical properties, Wacker HDK V15 is a hydrophilic fumed silica with 14nm primary particles and 130-170 m²/g surface area. Its high-purity amorphous structure (≥99.8% SiO₂) and surface silanol groups (2 SiOH/nm²) deliver exceptional thickening, thixotropy, and reinforcement, widely used in silicone rubber, coatings, and adhesives with pH 3.8-4.3

Features Of WACKER Hydrophilic Fumed Silica HDK V15

  1. Thickening Power: Achieves 3000-4200 mPa·s viscosity in unsaturated polyester resins, 50% higher thixotropic index

  2. Broad Compatibility: Stable in water/solvent systems with epoxy/acrylic resins, no bleeding

  3. Reinforcement: 5-10% dosage in silicones increases tear strength by 60%, maintaining >90% transparency

  4. Thermal Stability: Withstands 1000℃ (<2% ignition loss), no caking after 90 days at 50℃

  5. Eco-Safe: FDA 21 CFR 175.300 compliant, heavy metal-free, >70% biodegradability

Typical Applications Of WACKER Hydrophilic Fumed Silica HDK V15

  1. Silicone Rubber: Filler for HTV/RTV silicones, enhancing mechanical/dielectric properties

  2. Industrial Coatings: Anti-sagging in epoxy floors, >1000h salt spray resistance

  3. Printing Inks: Improves pigment dispersion, +20% print clarity

  4. Adhesives: Thickening/thixotropy in sealants, +30% shear strength

  5. Batteries: Stabilizer for gel electrolytes, doubles service life

Specifications Of WACKER Hydrophilic Fumed Silica HDK V15

Chemical TypeHydrophilic fumed silica
AppearanceFluffy white powder
Surface Area (BET)130-170 m²/g
Primary Particle Size14 nm
SiO2 Content≥99.8%
pH (4% aqueous)3.8-4.3
Ignition Loss (1000℃)<2%
Bulk Density~50 g/L
Moisture Content<1.5%
Packaging10kg/moisture-proof paper bag


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