ULTRASIL® VN 2 GR
- Chemical Name
- Silica gel pptd. cryst.-free
- Chemical Family
- Silica
ULTRASIL® VN 2 GR is primarily used at high filler loadings in PCT (passenger car tire) tread compounds without any loss in processing behavior. This silica is particularly well-suited for use in combination with bifunctional organosilanes, which help to optimize wet and winter properties. Additionally, high static moduli are observed with and without additional organosilanes. This is why ULTRASIL® VN 2 GR is also widely used in other mechanical rubber goods. It is available in both powder and granulated silica forms.
Properties
- Physical Form
- Granules
- Powder
- Solid
Product families
Applications
- Consumer Goods — Footwear
- Equipment & Parts
Product Families
- Fillers & Extenders
Other characteristics
- Brand
- ULTRASIL
- Features
Excellent Water Swell Resistance, Good Abrasion Resistance, Good Mechanical Properties, Good Processability, High Hardness, High Tensile Strength, Tear Resistance
- Functions
- Reinforcement
- Note
1) based on original substance 2) based on ignited substance (2 h/1000°C) *) The given data are typical values. Specifications on request.
- Markets
- Consumer Goods
- Industrial
- Appearance
- White granule
- Shelf LIfe
- 2 years
- Technology
- Elastomers
- Labeling Claims
- Not Listed In California Proposition 65
- Material Features
- Excellent Water Swell Resistance
- Good Abrasion Resistance
- Good Mechanical Properties
- Good Processability
- High Hardness
- High Tensile Strength
- Tear Resistance
- Chemical Description
SiO₂, synthetically produced amorphous silicon dioxide.
- Chemical Inventories
- AICS (Australia)
- DSL (Canada)
- EINECS (EU)
- ENCS (Japan)
- IECSC (China)
- KECI (Korea)
- NZIoC (New Zealand)
- PICCS (Phillipines)
- Applications
Due to its lower specific surface area, ULTRASIL® VN 2 GR has a slightly lower reinforcing potential compared to ULTRASIL® VN 3. It imparts to rubber compounds high Shore hardness, tensile strength, tear resistance and abrasion resistance and offers advantages concerning compound viscosity and processing. In order to achieve optimum rubber-technical data the addition of activators like glycols, amines or other alkaline accelerators is necessary. Application fields are: Tires, mechanical rubber goods.
- Packaging Information
Our silica products are inert and extremely stable chemically. However, due to their high specific surface area, they can absorb moisture and volatile organic compounds from the surrounding atmosphere. Therefore, we recommend storing the products in sealed containers in a dry, cool place, and removed from volatile organic substances. Even if a product is stored under these conditions, after a longer period it can still pick up ambient moisture over time, which could lead to its exceeding the specified moisture content. For this reason, our recommended use-by date is 24 months after date of manufacture. Product more than 24 months old should be tested for moisture content before use in order to make certain that it is still suitable for the intended application.
- Certifications and Compliance
- REACH (Europe)
- Plastics and Elastomers Functions
- Reinforcement
Technical data
Table 1 of 1
11 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Copper Content¹ | max. 6 | ppm | Internal Method |
| Manganese Content¹ | max. 6 | ppm | Internal Method |
| Iron Content¹ | max. 400 | ppm | Internal Method |
| SiO₂ Content² | min. 97 | % | ISO 3262-19 |
| SA Ro-Tap (< 75 µm) | max. 10 | % | ISO 5794-1F |
| SA Ro-Tap (> 300 µm) | min. 80 | % | ISO 5794-1F |
| Electrical Conductivity (4% in water) | max. 1300 | µS/cm | ISO 787-14 |
| Pour Density | 260 | g/l | ASTM D1513 |
| pH Value (5 % in water) | 6.9 | — | ISO 787-9 |
| Loss on Drying (2h at 105°C) | 5.5 | % | ISO 787-2 |
| Specific Surface Area (N₂, Multipoint) | 130 | m²/g | ISO 9277 |
