ULTRASIL® 880
- Chemical Name
- Silicic acid calcium salt
- Chemical Family
- Silica
ULTRASIL® 880 is a precipitated silica that contains a calcium admixture and has a very low specific N2 surface area of approximately 35m²/g. When added to rubber mixtures, it provides excellent residual deformation and extrusion characteristics. ULTRASIL® 880 also enables the creation of profiles with minimal swelling and a very smooth surface. Even EPDM mixtures with extremely high filling grades (up to 200 parts per hundred of rubber) can still be processed with ease. In white mixtures, ULTRASIL® 880 can be used in partial substitution for titanium dioxide. The impact of sulfur adsorption is negligible.
Properties
- Physical Form
- Powder
Product families
Applications
- Equipment & Parts
Product Families
- Fillers & Extenders
Other characteristics
- Brand
- ULTRASIL
- Features
Good Compression Set, Good Extrusion Properties, Good Processability, Low Die Swell, Smooth Surface Finish
- Synonyms
Calcium hydrosilicate, Calcium monosilicate, Calcium polysilicate, Calcium silicate, E 552
- 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
- Industrial
- Appearance
- White powder
- Shelf LIfe
- 2 years
- Technology
- Elastomers
- Labeling Claims
- Not Listed In California Proposition 65
- Material Features
- Good Compression Set
- Good Extrusion Properties
- Good Processability
- Low Die Swell
- Smooth Surface Finish
- Chemical Description
SiO₂/CaO, synthetically produced amorphous silicon dioxide/calcium silicate.
- Chemical Inventories
- AICS (Australia)
- DSL (Canada)
- EINECS (EU)
- ENCS (Japan)
- IECSC (China)
- KECI (Korea)
- NZIoC (New Zealand)
- PICCS (Phillipines)
- Applications
ULTRASIL® 880 has medium reinforcing potential. It imparts excellent compression set and extrusion properties to rubber compounds. ULTRASIL® 880 thus allows the production of profiles with low die swell and very smooth surfaces. Even EPDM compounds with extremely high filler loading can still easily be processed. In white compounds ULTRASIL® 880 can be used as a partial replacement for titanium dioxide. Sulfur cure is only marginally affected. Application fields are: 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 |
|---|---|---|---|
| Sodium Content | 2 | % | Internal Method |
| Chlorine Content | 1 | % | Internal Method |
| Iron Content¹ | max. 400 | ppm | Internal Method |
| Calcium Content | 6.5 | % | Internal Method |
| SiO₂ Content² | min. 87 | % | ISO 3262-19 |
| Loss on Ignition (2 hat 1000°C) | max. 10.5 | % | ISO 3262-1 |
| Sieve Residue (Mocker 45 µm) | max. 0.15 | % | ISO 787-18 |
| Tamped Density | 260 | g/l | ISO 787-11 |
| pH Value (5 % in water) | 10.5 | — | ISO 787-9 |
| Loss on Drying (2h at 105°C) | 5.5 | % | ISO 787-2 |
| Specific Surface Area (N₂, Multipoint) | 35 | m²/g | ISO 9277 |
