(ZH-900) type silica gel-purposed white carbon black (silica)
Chemical name: Precipitation hydrated silica
Chemical formula: SiO2.nH2O
Appearance: white powdery
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Quality index: In accordance with the standard of HG/T3061-1999 for Precipitation hydrated silica as rubber additive.
Item |
Index |
Silica % ≥ |
93 |
Color |
better than or equivalent to master standard |
Residue on sieve(45um)% ≤ |
0.1 |
Loss on heat % |
5.0-6.5 |
Loss on ignition % ≤ |
6.0 |
PH |
6.0-7.0 |
Total iron(mg/kg) ≤ |
300-500 |
DBP absorption value(cm3/g) |
2.30-3.00 |
Specific surface area (m2/g) |
160-180 |
Sulfate % ≤ |
0.5-1.0 |
Average size(um) |
10-18 |
Uses: for heat vulcanization silicone rubber.
Packing: PE film bag lined woven bag, Net wt 10Kg.
Features: steady quality and good dispersion in silicone rubber, good reinforced effects, whiteness and transparency, and easy to process. |
