HIFULL HB-151 is a high-performance hydrophobic fumed silica modified by DDS from HL-150 hydrophilic silica. It features stable hydrophobicity, efficient thixotropy, excellent reinforcement and flow aid, specially designed for electronic potting, silicone rubber and adhesives.
DDS deep hydrophobic modification – treated with dimethyldichlorosilane, stable hydrophobicity and hydrolysis resistance, improve shelf life
Precise thixotropic control – balanced rheology, anti-sagging and anti-sedimentation, optimize application
Electronic-grade stability – low impurity, high insulation, suitable for electronic potting
Efficient reinforcement – greatly improve strength and toughness of silicone rubber
Easy dispersion – fluffy powder, fast wetting, good processability
Electronic potting – insulation, reinforcement and rheology stability for electronic components
RTV silicone rubber – thickening, thixotropy, longer shelf life
Adhesives & sealants – better rheology and bonding strength
Paints & inks – anti-sedimentation, anti-sagging, better film performance
Powder coatings – flow aid, anti-caking, reduce white spots
| Appearance | Fluffy white powder |
| Modifier | Hexamethyldisilazane (HMDS) |
| SiO₂ Content | ≥99.8% |
| BET Surface Area | 300±30 m²/g |
| Carbon Content | 3.5–6.5% |
| pH Value (4% dispersion, H₂O:Ethanol=1:1) | 7.0–8.5 |
| Loss on Drying | ≤0.5% |
| Loss on Ignition | ≤8.0% |
| Tap Density | 40–60 g/dm³ |
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E-mail: wangxingqiang@ericwchem.com
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