WACKER HD H30RM is a hydrophobic fumed silica (200 m²/g BET) for polar resin systems like epoxy/polyurethane. As a rheology modifier, it provides thixotropy and anti-settling in coatings and adhesives while enhancing mechanical strength, with 3.0-4.6% carbon content for optimized performance
Surface Modification: Trimethylsiloxy groups ensure hydrophobicity (pH 5.5-7.5)
Rheology Control: Reduces pigment settling by 50% in solvent systems
Thermal Stability: Maintains performance up to 300°C in silicone rubber
Low Moisture: <1.0% water content (105°C) for storage stability
Easy Dispersion: Tamped density ~60 g/l for uniform mixing
Industrial Coatings: Anti-sagging in epoxy/PU paints
Adhesives: Thixotropy modifier in PVC hot melts
Cable Gels: Dielectric enhancer for insulation materials
Printing Inks: Flow control in flexographic inks
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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