Jinsha Precipitated Silica Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of silicon dioxide (precipitated silica powder) for silicone rubber industry in China. With abundant experience, we warmly welcome you to buy high quality products made in China here from our factory. Contact us for more details.
Silicon Dioxide (precipitated silica powder) for Silicone Rubber Industry
Product:Precipitated silica(SiO2) for food grade silicone rubber
Item No.:JS-130
CAS. NO.:7631-86-9
Delivery time:20days after receipt of your payment
HS CODE:281122
Silicone rubber is a type of polydimethylsiloxane terminated with dimethyl silicone, which has many excellent properties such as high temperature resistance, oxidation resistance, radiation resistance, etc. These excellent properties determine the wide application of silicone rubber in aviation, automotive, mechanical and other fields.
The function of silicon dioxide
In the preparation of silicone rubber, adding appropriate amount of silica can improve the stability and anti-aging properties of silicone rubber. Specifically, silica can serve the following purposes:
1. Enhance the physical properties of silicone rubber, such as increasing hardness and tensile strength;
2. Enhance the anti-aging performance of silicone rubber, such as anti-oxidation, UV resistance, etc;
3. Adjust the rheological properties of silicone rubber, such as improving viscosity and reducing fluidity.
Our product JS-160 has a exellent performance in silicone rubber industry,the specification as below
JS-160
|
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 |
5.15 |
|
HG/T3066-2008 |
Ignition loss 1000℃ 灼烧减量 |
% |
Max.6.0 |
3.90 |
|
HG/T3072-2008 |
DBP absorption value DBP吸收值 |
cm3/g |
2.3-2.6 |
2.48 |
|
HG/T3067-2008 |
pH value (10%aqueous suspension) pH值 |
- |
6.0-8.0 |
6.58 |
|
HG/T3062-2008 |
SiO2 (Dry Basis) 二氧化硅(干基) |
% |
Min.96 |
98.4 |
|
HG/T3073-1999 |
BET specific surface area BET比表面积 |
m2/g |
140-170 |
148 |
|
Soluble salt (Na2SO4) 可溶性盐 |
% |
Max.0.5 |
0.25 |
Q&A:
The method of adding silica in silicone rubber industry:
Silicon dioxide in silicone rubber is usually added in the form of precipitation or drying, among which precipitation method is currently the most widely used addition method. The precipitation method can control the particle size and distribution of silica, thereby achieving precise control of the physical and rheological properties of silicone rubber.
In the preparation of silicone rubber, proper addition of silicon dioxide can improve the stability and anti-aging properties of silicone rubber, so that silicone rubber can play the best performance in various extreme environments.
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