779-1 Precipitated Silica in Silicone Rubber
precipitated Silica in Silicone Rubber products
Chemical Properties
Precipitated Silica:
- Lower surface area (50–200 m²/g) than fumed silica but more cost-effective.
- Used in general-purpose silicone rubber products where moderate reinforcement is sufficient.
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.
White carbon black plays a pivotal role in improving the performance, durability, and versatility of silicone rubber products. Whether enhancing mechanical strength, thermal stability, or rheology, the right choice of silica type and proper formulation ensure that silicone rubber meets the demands of diverse applications across industries like automotive, medical, electronics, and construction.
similar name:SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Conventional Silica Powder, Amorphous Precipitated Silica
| Silica Product List From Ecopower | |||||
| Product Code | Type | SiO2: | Surface Area (BET) m2/g |
pH value | Application and Property |
| Silicon Silica （For Silicone Rubber ） |
779 | ≥98% | 130-160 | 6-7 | Easily Dispersible silica |
| 779-1 | ≥98% | 150-180 | 6-7 | Refined silica,transparecy ,good reinforcing. | |
| 800 | ≥98% | 150-180 | 6-7 | High anti yellowing silica.transparecy. | |
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