Item Name: Stobicast® L 653.00
Manufacturer: Stockmeier Urethanes GmbH & Co. KG
Technologies: 2-component polyurethane casting resin, UV-stable, halogen- and heavy metal-free
Color: Clear, transparent
Cure Type: Ambient or heat cure (e.g., 4 h at 60 °C), pot life 1–50 min
Package Size: 200 L drums, other sizes on request
Shelf Life: 6 months (15–25 °C, unopened, protected from humidity)
Stobicast® L 653.00 is a UV-light stable, transparent, and flexible two-component polyurethane casting resin. Specially designed for the electrical industry, it offers a low-viscosity mixture ideal for manufacturing small components. Free from halogen and heavy metals, it complies with RoHS (2002/95/EG) and WEEE (2002/96/EG) directives. With adjustable pot life and accelerated curing when heated, it provides versatility for industrial casting processes while ensuring environmental compliance and product reliability.
Encapsulation of small electrical parts requiring transparency and flexibility.
Suitable for low-viscosity casting in the electronics industry.
Ideal for applications where UV stability and environmental compliance are critical.
| Property | Value / Description |
|---|---|
| Mix Ratio (Polyol:Isocyanate) | 100:50 (by weight) |
| Density (g/cm³) | Polyol 1.02 / Isocyanate 1.14 / Mixture 1.07 |
| Viscosity (mPa·s) | Polyol 700 / Isocyanate 170 / Mixture 400 |
| Pot Life | 1 – 50 min at 20°C |
| Colour | Clear, transparent |
| Curing Profile | Accelerated with heat (e.g. 4h at 60°C) |
| Shore Hardness | 65 A |
| Tensile Strength | 2.3 N/mm² |
| Elongation at Break | 75% |
| Impact Strength | 20 kJ/m² |
| Thermal Conductivity | 0.15 W/m·K |
| Glass Transition Temperature | -20°C |
| Temperature Index | 128°C |
| Water Absorption | 0.84% (24h), 1.68% (96h) |
| Linear Thermal Expansion | 140 × 10⁻⁶ K⁻¹ |
| Dielectric Strength | 28 kV/mm |
| Surface Resistivity | 10¹³ Ω |
| Tracking Resistivity (CTI) | >600 V |
| Dielectric Constant (50 Hz) | 23°C = 5.9 / 50°C = 7.1 / 80°C = 8.1 |
| Dissipation Factor (50 Hz) | 23°C = 0.09 / 50°C = 0.12 / 80°C = 0.12 |
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