Product Description
MICARES® X1087BK / P978 is a two-component polyurethane casting resin system with a mixing ratio of 100:20, specially formulated for electrical and electronics potting applications. The system is self-extinguishing, UL 94 V-0 listed, and provides excellent dielectric properties, offering RTI (Relative Thermal Index) of 130°C. It cures from cold to thermal conditions and remains solvent-free with good adhesion to both metallic and non-metallic surfaces.
Features of MICARES® X1087BK / P978
- Two-component polyurethane system (100:20 mix ratio)
- Self-extinguishing and UL 94 V-0 certified
- Electrical RTI of 130°C for long-term heat resistance
- Excellent adhesion to metallic and non-metallic materials
- Low dielectric loss and strong resistance to tracking
- Solvent-free formulation, liquid at room temperature
- Cold to thermal curing flexibility
- Resin pre-filled and degassed for easier processing
Applications of MICARES® X1087BK / P978
- Electrical insulation and potting for electronics
- Encapsulation of electrical components requiring flame retardancy
- Flexible potting for devices exposed to varying thermal conditions
- Use in applications demanding low dielectric loss and high thermal stability
- Ideal for both metallic and plastic component encapsulation
Storage: Shelf life is 12 months for the resin and 9 months for the hardener when stored in original sealed containers at room temperature and away from direct sunlight.
Properties of Micares® X1087 BK Resin (as supplied)
| Property | Conditions | Value | Units |
|---|---|---|---|
| Viscosity Brookfield | 25 °C | 3000 – 6000 | mPa.s |
| Density | 25 °C | 1.40 – 1.45 | g/ml |
| Colour | Black |
Properties of Hardener P978 (as supplied)
| Property | Conditions | Value | Units |
|---|---|---|---|
| Viscosity Brookfield | 25 °C | 150 – 250 | mPa.s |
| Density | 25 °C | 1.20 – 1.24 | g/ml |
| Colour | Brown |
Properties after Mixed (RESIN:HARDENER = 100:20)
| Property | Conditions | Value | Units |
|---|---|---|---|
| Viscosity Brookfield | 25 °C | 1800 – 2800 | mPa.s |
| Pot life | 25 °C | 15 – 25 | min |
| Gel time | 25 °C | 45 – 60 | min |
| Demoulding time | 25 °C | 7 – 9 | h |
Properties in Cure Condition (24h RT + 15h 60°C)
| Property | Conditions | Test Method | Value | Units |
|---|---|---|---|---|
| Density | 25 °C | ASTM D792 | 1.37 – 1.41 | g/ml |
| Hardness (Shore A / D) | 25 °C | ASTM D2240 | 85 – 90 / 40 – 50 | Shore A/D |
| Glass Transition (Tg) | ASTM D3418 | -5 to +10 | °C | |
| Water Absorption (240h) | RT | 0.2 – 0.3 | % | |
| Water Absorption (2h) | 100 °C | ASTM D570 | 0.8 – 1.0 | % |
| Linear Thermal Expansion (Tg -10°C) | ASTM E831 | 70 – 80 | 10⁻⁶ / °C | |
| Linear Thermal Expansion (Tg +10°C) | ASTM E831 | 160 – 180 | 10⁻⁶ / °C | |
| Thermal Shock | 10 Cycles | Olyphant | -40 – +170 | °C |
| Flammability | UL 94 | V0 (13 mm) | – | |
| Max Recommended Operating Temperature | UL746B (RTI) | 130 | °C | |
| Thermal Conductivity | 25 °C | ASTM C518 | 0.50 – 0.60 | W/(m·K) |
| Dielectrical Constant | 25 °C | ASTM D150 | 4.5 – 5.0 | – |
| Loss Factor | 25 °C | ASTM D150 | 100 – 130×10⁻³ | – |
| Volume Resistivity | 25 °C | ASTM D257 | 3.0×10¹⁴ – 5.0×10¹⁴ | Ω·cm |
| Dielectrical Strength | 25 °C | ASTM D149 | 21 – 24 | kV/mm |
| Tensile Strength | ASTM D638 | 4 – 6 | MN/m² | |
| Elongation at Break | ASTM D638 | 50 – 60 | % |
