Silicone Rubber Grade 779 Precipitated Silica
Medium Partical Size: 10-14um and BET specific surface area 130-160 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 in sulation, odourless properties.
Specifications
|
Items |
Specification |
|
Appearance |
White Powder |
|
BET specific surface area m²/g |
130-160 |
|
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 2h% Max |
7.0 |
|
pH Value (5% 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
779 take better reinforcement effecton high temperaturevulcanized silicone rubber.
It has high transparent,good antiyellowing effect,and good processability properties.
SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Conventional Silica Powder, Micro pearl precipitated silica
