140 Powder Precipitated Silica for Rubber
Medium Size surface Area Silica 140
Product Name
SiO2, Precipitated Silica, White Carbon black, Silicon Dioxide, Conventional Silica Powder
Chemical Properties
White powder, precipitated silcia is made of sodium silicate with sulfuric acid through hydrolysis.
It can be dissolved by NaOH,HF. Other kinds of acid, water and solvents cannot dissolve the product.
Specifications
|
Items |
Units |
Specification |
|
Appearance |
---- |
White Powder |
|
Loss at 105oC 2h |
% |
4.0-8.0 |
|
Igniting Loss 1000oC 2h |
% |
7.0Max |
|
DBP absorption Value |
cm3/g |
2.00-2.80 |
|
45Mesh sieve residue |
% |
0.5 Min |
|
pH Value (5% aqueous suspension) |
----- |
6.0-8.0 |
|
SiO2 % Min |
% |
97Min |
|
BET specific surface area |
m2/g | 125-155 |
Application
1. 140P Silicon Dioxide is a versatile inorganic chemical which are used for reinforcement of rubber seals, battery separators, rubber sacs, belts and tyres industries etc.
2. 140P White Carbon black possesses a high reinforcing potential and imparts rubber compounds as the lower specific surface. It can improve high Shore hardness, tensile strength, tear resistance and abrasion resistance, less deformation under compression, and extended products life.
3. In order to achieve optimum rubber-technical data the addition of activators like glycols, amines or other alkaline accelerators is necessary.
