Position：Hydrophilic Fumed Silica
Hydrophobic Fumed Silica
Hydrophobic Fumed Silica
Product Parameter：
| pH: | 5.0～8.0 | Specific Surface Area (BET) | 140±20 |
| Loss on ignition | ≤ 2.0 | Tamped density | 40～60 |
|---|---|---|---|
| Product application: | Room temperature vulcanization (RTV)silicone rubber, ceramics, pesticides, defoamers | ||
Product Description：
Hydrophobic Fumed Silica
HB-612
Characteristic
FM-H-B612 is hydrophobic fumed silica which produced by hydrophilic fumed silica with specific surface Area of 150m²/g after chemical post-treatment with HMDS (Hexamethyldisilazane)
Physical and Chemical Data (Standard: GB/T 20020)
Parameters Table：
Application：
HB-612
Characteristic
FM-H-B612 is hydrophobic fumed silica which produced by hydrophilic fumed silica with specific surface Area of 150m²/g after chemical post-treatment with HMDS (Hexamethyldisilazane)
Physical and Chemical Data (Standard: GB/T 20020)
| Test Item | Unit | Typical Value |
| Specific Surface Area(BET) | m²/g | 140±20 |
| Carbon Content(Based on material dried at 105℃ for 2 hours) | % | 0.7～1.3 |
| pH value in 4% dispersion | -- | 5.0～8.0 |
| Loss on drying( 2 hours at 105℃) | % | ≤ 0.7 |
| Loss on ignition (2 hours at 1000℃, based on material dried for 2 hours at 105℃) | % | ≤ 2.0 |
| Tamped Density (Based on material dried at 105℃ for 2 hours) | g/L | 40～60 |
| Silica Content (Based on ignited material) | % | ≥ 99.8 |
Parameters Table：
Fumed Silica Powder
| Grade | Specific Surface Area (nitroger adsorption method)(m²/g) | pH value in dispersion | Loss at 105℃(%) | Loss on ignition | Sieve residue (45μm)(mg/kg) | Silica content -96 | Carbon content | Tamped density | Product application |
| Hydrophobic Fumed Silica | |||||||||
| HB-612 | 140±20 | 5.0～8.0 | ≤ 0.7 | ≤ 2.0 | -- | ≥ 99.8 | 0.7~1.3 | 40～60 | Room temperature vulcanization (RTV)silicone rubber, ceramics, pesticides, defoamers |
| HB-615 | 140±20 | 5.0～8.0 | ≤ 0.7 | ≤ 4.0 | -- | ≥99.8 | 1.0～1.7 | 40～60 | Ink, electronic potting adhesive, defoamer, silicone rubber |
| HB-620 | 170±30 | 6.0～9.0 | ≤ 0.7 | ≤ 4.0 | -- | ≥99.8 | 1.5～2.5 | 40～60 | Silicone rubber,powdercoating, defoamer,paint |
| HB-630 | 300±30 | 6.0～9.0 | ≤ 0.7 | ≤ 5.0 | -- | ≥99.8 | 2.5～4.0 | 40～60 | |
| HB-132 | 140±20 | 6.0~9.0 | ≤ 0.7 | ≤ 4.0 | -- | ≥99.8 | 2.0～4.0 | 40～60 | Silicone rubber, defoamer,adhesive, sealant |
| HB-139 | 110±30 | 4.0～7.0 | ≤ 0.7 | ≤10.0 | -- | ≥99.8 | 4.0～7.0 | 40～60 | Powder coatings, adhesives, coatings,sealants |
| HB-151 | 120±30 | ≥3.7 | ≤ 0.7 | ≤ 2.5 | -- | ≥99.8 | 0.6～1.2 | 40～60 | Coatings,inks, adhesives, MS adhesives |
| HB-152 | 170±30 | ≥3.7 | ≤ 0.7 | ≤ 2.5 | -- | ≥99.8 | 0.8～1.6 | 40～60 | |
| Applications | Properties |
| ● RTV silicone rubber | ● Rheological control of RTV silicone rubber |
| ● Adhesives & sealants | ● Anti-settling,anti-sagging and thixotropy agent |
| ● Coatings & Printing Ink | ● Free flow aid and anti-caking aid for powders |
| ● Powder Coating | ● Thixotropy agent & reinforce filler for RTV silicone sealants, the hydrophobic feature enables RTV silicone sealants a long guarantee time |