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

WACKER Hydrophilic Fumed Silica HDK N20

WACKER HDK N20 is a hydrophilic fumed silica (170-230m²/g) for rheology control. With >99.8% purity, it enhances flowability and anti-caking in food, coatings and silicone rubbers, available in 10kg bags.

Features Of  WACKER Hydrophilic Fumed Silica HDK N20

  1. High Purity: >99.8% SiO₂ content (DIN EN ISO 3262-19)

  2. Rheology Control: Effective thickener for paints/adhesives

  3. Food Safety: Compliant with food contact applications

  4. Surface Area: 170-230 m²/g (DIN ISO 9277)

  5. Moisture Resistance: <1.5% water content (105℃)

  6. Easy Dispersion: <0.04% residue (>40μm sieve)

Typical Applications Of  WACKER Hydrophilic Fumed Silica HDK N20

  1. Food Additive: Anti-caking agent in powders

  2. Coatings: Thickener for EP/UP/PU resins

  3. Silicone Rubber: Reinforcing filler for HTV/RTV

  4. Electronics: Battery gel component

  5. Inks: Rheology modifier for printing inks

Specifications Of WACKER Hydrophilic Fumed Silica HDK N20

Silica contentDIN EN ISO 3262-19>99.8%
Loss on ignition (1000°C/2h)DIN EN ISO 3262-19<2%
Silica densityDIN 51757~2.2 g/cm³
Refractive index-1.46
Silanol group density-2 SiOH/nm²
BET surface areaDIN ISO 9277/DIN 66132170-230 m²/g
pH (4% dispersion)DIN EN ISO 787-93.8-4.3
Bulk densityDIN EN ISO 787-11~40 g/l
Loss on drying (105°C,2h)DIN EN ISO 787-2<1.5%
Residue on sieve (>40μm)DIN EN ISO 787-18<0.04%


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