Precipitated silica, also called ‘white carbon black‘, is an amorphous form of silica (silicon dioxide, SiO2); it is a white, powdery material. Precipitated silica is produced by precipitation from a solution containing silicate salts.
ZC 185 Powder Precipitated Silica for Rubber
Product Name
SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Conventional Silica Powder, Granular Silica
Chemical Properties
White powder or granular form, precipitated silcia is made of sodium silicate with sulfuric acide through hydrolysis.
It can be dissolved by NaOH,HF. Other kinds of acid, water and solvents can not dissolve the product.
Specifications
|
Items |
Specification |
|
Appearance |
White Powder |
|
Loss at 105 oC 2h % |
4.0-8.0 |
|
Igniting Loss 1000 oC 2h % Max. |
7.0 |
|
DBP absorption Value cm3 /g |
2.00-2.80 |
|
45Mesh sieve residue % Min |
0.5 |
|
pH Value(5% aqueous suspension) |
6.0-8.0 |
|
SiO2 % Min |
97 |
|
BET specific surface area m2/g |
165-195 |
Application
2. In order to achieve optimum rubber-technical data the addition of activators like glycols, amines or other alkaline accelerators is necessary.
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