Precipitated Silica As Reinforcing Filler For Silicon Tubes with
more efficient mixing
Product name: Precipitated silica
Similar name: White carbon black, precipitated silica,silicon dioxide,SiO2, hydrated silicon dioxide, hydrated silica
Type: SAI - 773
Good viscosity,high purity and high activity, iron content low, and
specific surface area.
Test Item Specification Unit
Form Powder ---
DBP absorption Value 2.0 - 2.7 cm³ / g
SiO2 ( Dry Basis ) more than 97 %
BET specific surface area 160 - 210 ㎡ / g
Ignition Loss at 1000 ℃ 2h less than 7.0 %
pH Value ( 5% aqueous suspension ) 7.0 ± 1.0
Salt As Na2SO4 1 %
Heating Loss at 105 ℃ 2h % less than 4.0 - 8.0 %
When this kind precipitated silica is used in silicone rubber
compounders by providing:
More flexible inventory management through reduced shelf
hardening;Faster, more efficient mixing and re-milling of
elastomers;less fly-loss-related product waste
silicone rubber applications have certain physical strength
requirements for example: wire and cable, medical and surgical,
belting, hose, tubing and various fuel-resistant rubbers uses.
When physical strength is a primary concern, reinforcing silica is
the filler of choice.
Precipitated Silica is used in Silicon Rubber for following reasons
• Improves process ability of raw mixture.
• Offers resistance to heat aging.
• Minimizes crape hardening.
• Provides superior resilience and compression set.
Package and storage
1. Package:20kg / bag.
2. Storage: Kept in a low temperature, dry and ventilated place.
3. Shelf life: One year in ventilating, cool and dry area.