779-1 Precipitated Silica in Silicone Rubber
Medium Partical Size: 10-14um and BET specific surface area 150-180 m²/g
Chemical Properties
White powder form,with low iron raw materials. It is high reinforced ultrafine Silica with strict purifying technology specialized use for high temperature vulcanized silicone rubber.
It can be dissolved by NaOH,HF Other kinds of acid, water and organic solvents cannot dissolve the product. Resistance to high temperature, no combustion,good insulation, odourless properties.
Specifications
| Items | Specification |
| Appearance | White Powder |
| BET specific surface area m2/g | 150-180 |
| Salt As Na2SO4% Max | 0.7 |
| SiO2 % Min | 98 |
| Heating Loss at 105°C 2h% Max | 4.0-8.0 |
| Ignition Loss at 1000°C % Max | 7.0 |
| pH Value (10% aqueous suspension) | 6.0-7.0 |
| DBP absorption Value cm³/g | 2.0-2.7 |
| Total Fe mg/kg Max | 200 |
| Medium Size (D50)µm | 10-14 |
Application
7791 is used widely for high temperature vulcanized silicone rubber.
7791 has high transparent, good anti yellowing effect, high hardness effect, and better reinforcement effect.
SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Conventional Silica Powder, Amorphous Precipitated Silica, Micro pearl precipitated silica
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