Recovered Silica RBS

Category Rubber Additives

Basic Product Overview:

Appearance: Gray-black powder
Main Composition:
- Primarily silicon dioxide (SiO2, 86.7%),
- with minor amounts of aluminum oxide (Al2O3, 7.93%), sodium oxide (Na2O, 1.96%), and iron oxide (Fe2O3, 1.44%), among others.
- In addition, due to the incorporation of paraffin oil during the production process, the treated product contains approximately 3% paraffin oil.
Structural Characteristics: Possesses a porous structure with good adsorption performance; pH is approximately 7, indicating a neutral to slightly alkaline nature.

Characteristics:

pH is approximately 7, classified as neutral to slightly alkaline
Particle size falls within the medium-fine powder range, with D50 of approximately 23.9 μm
Specific gravity is approximately 2.6 g/cm³

Recycled Source:
The product is derived from the “white fume” material generated during the solar panel recycling process.
Low Heavy Metal Content:
Through a refining process, the product contains extremely low levels of heavy metals.
International Certifications:
It has passed REACH testing for polycyclic aromatic hydrocarbons (PAHs) and complies with relevant RoHS requirements.
UL 2809 certification for recycled content / sustainability is currently in progress and is expected to be obtained in 2026, offering strong advantages in carbon reduction and environmental marketing.

High Silica Content:
The main component, silicon dioxide (SiO2), accounts for as much as 86.7%.
Abrasion Resistance and Reinforcement:
The product contains approximately 7.93% aluminum oxide (Al2O3), which can significantly improve the abrasion resistance of the end product.
Physical Properties:
- Particle Size: D50 = 23.9 μm
- Appearance: Naturally gray-black in color
- Color Adjustment Suggestion: For white or light-colored applications, titanium dioxide may be added to improve whiteness.

When used in rubber compounds, this product serves as a functional filler.
It can be used as a partial replacement for, or in combination with, conventional fillers.
It helps adjust the following rubber properties:
1. Hardness
2. Tensile strength
3. Elongation
4. Processability
5. Formulation cost balance

This product features high hardness and excellent adhesion, making it especially suitable for the following applications:

Paint and Coating Reinforcement:Improves coating hardness and enhances resistance to peeling.
Wear-Resistant Layer Materials:Suitable for surface treatment applications requiring high friction and abrasion resistance.
Rubber Fillers:
- In natural rubber (NR), it can adjust hardness and significantly improve elongation (from 480% to 556%).
- In nitrile rubber (NBR), its performance is comparable to conventional fillers and even slightly better than silica in terms of tensile strength.
- In ethylene propylene diene monomer (EPDM), it can significantly improve processing elasticity.

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