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Identification & Functionality
- Chemical Family
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- Technologies
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Features & Benefits
- Labeling Claims
- CASE Ingredients Features
Applications & Uses
- Markets
- Compatible Substrates & Surfaces
- Coating Type
- Applications
- Industrial Textiles
- Sleevings
- Application Details
- ELASTOSIL® LR 6240 A/B is a liquid silicone rubber with low viscosity to produce flexible textile coatings. It is especially suitable for the manufacture of conveyor belts and electrical insulation tubing.
- The components of ELASTOSIL® LR 6240 A/B are in compliance with the positive lists of the Recommendation XV. Silicones of the BfR and FDA 21 CFR §175.300 and 177.2600. However, for compliance of the finished article with the before mentioned regulations the product has to be appropriately cured and given limitations on extractable and volatile substances have to be met.
Processing
- ELASTOSIL® LR 6240 A/B is processed by thorough mixing of component A and B in a ratio of 1 : 1
- Recommended curing conditions: 3 min at 150°C or 1 min at 180°C
- Adhesion of ELASTOSIL® LR 6240 A/B depends on substrate and can be improved with additives (e.g. CATALYST C05 or adhesion promoters). Preliminary testing should be carried out to determine optimum formulation and cure conditions.
Properties
- Physical Form
- Typical Properties
- Cured Properties
- Uncured Properties
- Properties
- High flexibility and resilience
- High modulus
- Note
Cure conditions: mixture of LR 6240 A/B in ratio 1 : 1, 5 min / 165°C for cured properties.
| Value | Units | Test Method / Conditions | |
| Pot Life (at 23°C) | 3 | Days | — |
| Value | Units | Test Method / Conditions | |
| Density | 1.07 | g/cm³ | DIN EN ISO 1183-1 A |
| Dielectric Strength (1mm sheet) | 19 | kV/mm | IEC 60243-1 |
| Dissipation Factor (tan δ, at 50Hz) | 140 × 10⁻⁴ | — | IEC 62631-2-1 |
| Elongation (at break) | 290 | % | ISO 37 Type 1 |
| Oxygen Index (LOI) | 26 | % | ASTM D 2863 |
| Permittivity (at 50Hz) | 2.9 | — | IEC 62631-2-1 |
| Shore Hardness A | 30 | — | DIN ISO 48-4 |
| Tear Strength | 4.9 | N/mm | ASTM D 624 B |
| Tensile Strength | 1.7 | N/mm² | ISO 37 Type 1 |
| Volume Resistivity | 5 x 10¹⁴ | Ohm-cm | IEC 62631-3-1 |
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (at 2.5 rpm, Component A) | 25000 | mPa·s | Brookfield |
| Dynamic Viscosity (at 2.5 rpm, Component B) | 25000 | mPa·s | Brookfield |
Packaging & Availability
- Country Availability
- Regional Availability
- Packaging Information
This product is available in 20 kg pails and 200 kg drum kits.
Storage & Handling
- Storage Information
Once opened, containers should always be resealed after use to prevent the platinum catalyst from being poisoned by amines, sulfur or phosphorus compounds.