WACKER HDK H30 is a hydrophobic fumed silica (200±20 m²/g) for polar resin systems. This rheology modifier enhances viscosity and thixotropy in epoxy/polyurethane formulations while improving mechanical strength in silicone rubbers.
Surface Area: 200±20 m²/g BET for precise rheology control
Thermal Stability: Maintains performance up to 300°C
Hydrophobicity: Treated with organosilanes for water resistance
Reinforcement: Increases HTV silicone tensile strength by 35%
Industrial Coatings: Anti-sagging agent for epoxy systems
Silicone Products: Reinforcing filler for HTV rubber
Adhesives: Thixotropy modifier in structural adhesives
Cable Gels: Dielectric enhancer in insulation materials
Silica Content | Method: DIN EN ISO 3262-19 | Unit: % | Value: >99.8 |
Silica Density | Method: | Unit: g/l | Value: 2200 |
Silanol Group Density | Method: | Unit: SiOH/nm² | Value: 2 |
BET Surface Area (Hydrophobic Fumed Silica) | Method: DIN ISO 9277/DIN 66132 | Unit: m²/g | Value: Approx. 250 |
[Physicochemical Performance Table] | |||
BET Surface Area (Hydrophilic Fumed Silica) | Method: DIN ISO 9277/DIN 66132 | Unit: m²/g | Value: 270 - 330 |
Carbon Content | Method: | Unit: % | Value: ca. 1.4 - 2.6 |
pH of 4% Dispersion | Method: DIN EN ISO 787-9 | Unit: | Value: 3.8 - 4.8 |
Bulk Density | Method: DIN EN ISO 787-11 | Unit: g/l | Value: ca. 40 |
Loss on Drying (105℃, 2h) | Method: DIN EN ISO 787-2 | Unit: % | Value: <0.6 |
Residual Amount (according to Mocker >40μm) | Method: DIN EN ISO 787-18 | Unit: % | Value: <0.05 |
Surface Modification | Method: | Unit: | Value: OSi(CH₃)₂- |
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