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Precipitated Silica in Rubber Antioxidants
Chemical Name:Precipitated silica 185C3
CAS. NO.7631-86-9
Appearance:White powder
Application:Rubber antioxidants
Rubber antioxidants play a critical role in extending the service life of rubber products by reducing oxidation-inducing processes such as heat, light, and exposure to oxygen. Precipitation methods are commonly used for the synthesis of rubber antioxidants due to their high yields and efficient purification. Precipitated silica is an essential component of this process, and it plays a crucial role in the formation of rubber antioxidants.
During the precipitation process, precipitated silica acts as a stabilizer for rubber antioxidants by facilitating their formation. The surface area and porosity of precipitated silica provide a platform for the nucleation and growth of rubber antioxidants by acting as a template. Additionally, as an inert material, precipitated silica provides a stable environment for the formation of rubber antioxidants and prevents agglomeration. The presence of precipitated silica also helps to control the particle size and distribution of rubber antioxidants, which is crucial for their efficacy in preventing oxidation.
Apart from its role in stabilizing rubber antioxidants, precipitated silica also contributes to their physical properties. The high surface area and porosity of precipitated silica facilitate the dispersion of rubber antioxidants, resulting in a more uniform mixture. Additionally, precipitated silica can influence the mechanical properties of rubber products by imparting rigidity and strength to the material.
Description:
JS-185C3
|
Test Methods |
Properties |
Units |
Target Values (Spec Limits) |
Actual Values |
|
HG/T3065-2008 |
Loss on drying (2Hrs,105℃)加热减量 |
% |
Max.6.0 |
5.65 |
|
HG/T3066-2008 |
Ignition loss 1000℃ 灼烧减量 |
% |
Max.7.0 |
3.95 |
|
HG/T3072-2008 |
DBP absorption value DBP吸收值 |
cm3/g |
2.6-2.9 |
2.75 |
|
HG/T3067-2008 |
pH value (10%aqueous suspension) pH值 |
— |
6.0-8.0 |
6.84 |
|
HG/T3062-2008 |
SiO2 (Dry Basis) 二氧化硅(干基） |
% |
Min.96 |
97.4 |
|
HG/T3073-1999 |
BET specific surface area BET比表面积 |
m2/g |
180-220 |
204 |
|
|
Soluble salt (Na2SO4) 可溶性盐 |
% |
Max.1.0 |
0.58 |
In conclusion, precipitated silica plays a crucial role in the formation of rubber antioxidants by acting as a stabilizer and controlling their particle size and distribution. Additionally, precipitated silica contributes to the physical properties of rubber products by facilitating the dispersion of antioxidants and enhancing their mechanical properties. Overall, the use of precipitated silica in the precipitation method of rubber antioxidants is essential for the production of high-quality and effective rubber products.
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