Silicone Rubber Grade Precipitated Silica
Type	Felcosil-799	Felcosil-779-1	Felcosil-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 Compounds

Precipitated Silica is a high-performance reinforcing filler designed for silicone rubber compounds. It is widely used by compounders and manufacturers to improve mechanical properties, maintain transparency, and ensure processing stability.

It significantly enhances tensile strength, tear strength, and abrasion resistance in silicone rubber. It also delivers excellent transparency with no whitening or deformation when stretched, making it ideal for high-quality finished products. In addition, it disperses quickly during mixing, supports efficient processing, and ensures consistent vulcanization with stable  quality.

 precipitated silica is suitable for a broad range of applications. It is used in silicone keypads for high click life and fatigue resistance, in seals and gaskets for superior compression set and heat stability, and in tubing and hoses for smooth surfaces and chemical resistance. It also meets the purity requirements for medical silicone products and the transparency and safety standards for kitchenware and consumer goods.

With high purity, low metal ion content, and reliable supply, our product helps customers achieve consistent quality while optimizing material costs. 

 

SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Silica Powder, Amorphous Precipitated Silica