Rubber Grade Precipitated White Powder Silica
Chemical Properties
Precipitated silica, a form of synthetic amorphous silicon dioxide, is derived from quartz sand, a crystalline form of silicon dioxide. The physical properties of precipitated silica can be manipulated during the manufacturing process to deliver products with a wide range of performance-enhancing features engineered for many different end-use applications.
- Efficient rheology control in a wide range of simple and complex liquid systems. Imparts viscosity, pseudoplasticity and thixotropy. Stabilises pigments and prevents sagging.
- Provides effective free flow and anti-caking behaviour. Can be used as a solid carrier for liquids.
- Improves mechanical and optical properties of silicone rubber.
- Improves anti-corrosion performance of protective and marine coatings. Reduces moistures sensitivity and increases hydrophobicity.
Specifications
| Precipitated Silica Powder |  |
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| Type | 120P | 140P | 165P | 175P | 185P | 195P |
| Heating loss（105° 2h）, % | 4.0-8.0 | |||||
| Lgniting loss（1000° 2h）, % | ≤7.0 | |||||
| DBP Absorption，cm³/g | 2.00-3.50 | |||||
| Sieve residue，% | 45um≤0.5 | |||||
| pH（5% suspension） | 6.0-8.0 | |||||
| SiO2 % Min，% | ≥97.0 | |||||
| BET specific surface area，m²/g | 120±15 | 140±15 | 160±15 | 175±15 | 180±15 | 190±15 |
| Salt as NA2SO4，% | ≤2.0 | |||||
| Pellet hardness | - | |||||
Application
- Precipitated Silica White are mainly used in Shoe making, Rubber Roller and Tyre industries.
- Precipitated Silica White possesses a high reinforcing potential and imparts to rubber compounds particularly high Shore hardness, tensile strength, tear resistance and abrasion resistance. In order to achieve optimum rubber-technical data the addition of activators like glycols, amines or other alkaline accelerators is necessary
SiO2, Precipitated Silica, White Carbon, Silicon Dioxide, Silica Powder, Amorphous Precipitated Silica, Arosil silica
