Precipitated Silica for Silicone Rubber
Chemical Properties
In the silicone rubber industry, Precipitated Silica not only has better tensile strength and wear resistance, but also has good transparency, no whitening and no deformation when stretched.
Specifications
Silicone Rubber Grade Precipitated Silica | ![]() |
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Type | 799 | 779-1 | 800 |
BET specific surface area,m²/g | 145±15 | 165±15 | 165±15 |
Heating loss(105° 2h), % | 4.0-8.0 | ||
Lgniting loss(1000° 2h), % | ≤7.0 | ||
SiO2 % Min, % | ≥98.0 | ||
pH(5% suspension) | 6.0-7.0 | ||
DBP Absorption, cm³/g | 2.00-2.70 | ||
Salt as NA2SO4, % | ≤0.7 | ||
Total Fe, mg/kg | ≤200 | ||
Median Size:D50, um | 12±2 |
Precipitated Silica for Silicone Rubber
SAI -779 take better reinforcement effect on high temperature vulcanized silicone rubber. It has
high transparent, good antiyellowing effect,and good processability properties.
Package and storage:
- Package:10kg/bag.
- Storage: Kept in a low temperature, dry and ventilated place.
- Shelf life: One year in ventilating, cool and dry area.
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