Precipitated Silica for Silicone Rubber

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.

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  
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:

  1. Package:10kg/bag.
  2. Storage: Kept in a low temperature, dry and ventilated place.
  3. Shelf life: One year in ventilating, cool and dry area.
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