Characteristics
HIFULL HB-151 is hydrophobic fumed silica which is produced by hydrophilic fumed silica with specific surface area of 150m2/g after chemical post-treatment with DDS(Dimethyldichlorosilane).
Applications
RTV silicone rubber,especially RTV-T
Adhesives & Sealants
Coatings & Printing ink
Powder Coating
Properties
Thixotropy and reinforcement in RTV silicone sealants, the hydrophobic feature gives RTV silicone sealants a long shelf-life
Rheology control in adhesives
Anti-settling, anti-sagging and thixotropy control
Free flow aid and anti-caking aid for powders
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Physical & Chemical Data
| Properties | Unit | Typical Value | Testing Standard |
| Specific surface area(BET) | m2/g | 120±30 | GB/T 20020 |
| pH value in 4% dispersion （H2O：Ethanol=1:1） | - | ≥3.7 | GB/T 20020 |
| Loss on drying(2 hours at 105℃) | % | ≤0.7 | GB/T 20020 |
| Loss on ignition(2 hours at 1000℃ based on material dried for 2 hours at 105℃) | % | ≤2.5 | GB/T 20020 |
| Silica Content(Based on ignited material) | % | ≥99.8 | GB/T 20020 |
| Tamped Density（Based on material dried at 105℃ for 2 hours） | g/dm³ | 40～60 | GB/T 20020 |
| Carbon Content (Based on material dried at 105℃ for 2 hours) | % | 0.6～1.2 | GB/T 20020 |
