Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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Item Name: Arathane® CW 5631 / HY 5611-1
Manufacturer: Huntsman Advanced Materials
Technologies: Polyurethane (casting and impregnating system, thermal class F)
Color: CW 5631 – Black liquid; HY 5611-1 – Brown liquid
Cure Type: Room temperature or heat cure (6 h at 80 °C)
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.
Arathane® CW 5631 (polyol with mineral filler) and Arathane® HY 5611-1 (isocyanate) form a two-component polyurethane casting and impregnating system. It is classified as Thermal Class F (155°C) and cures at room temperature or accelerated at 80°C. The system provides excellent thermal endurance, flow properties, thermal conductivity, chemical resistance, and thermal shock stability. It is non-abrasive and meets UL 94 V-0 flammability (6 mm).
Electrical insulation for transformers, filters, capacitors, and other electrical devices.
Suitable for casting and impregnating in both manual and automated processing.
Designed for electrical equipment operating in potentially explosive environments.
| Property | CW 5631 (Polyol) | HY 5611-1 (Isocyanate) |
|---|---|---|
| Appearance | Black liquid | Brown liquid |
| Specific Gravity (25°C) | 1.48 g/cm³ | 1.23 g/cm³ |
| Viscosity (25°C) | 3400 – 5100 mPa·s | 180 – 240 mPa·s |
| Property | Value |
|---|---|
| Mixing Ratio (pbw) | 100 (CW 5631) : 25 (HY 5611-1) |
| Mixing Ratio (vol.) | 100 : 30 |
| Mix Viscosity (25°C) | 3700 mPa·s |
| Gel Time (25°C) | 60 min |
| Pot Life (25°C) | ~7 min |
| Minimum Cure Cycle | 24 h at RT or 6 h at 80°C |
| Property | Value |
|---|---|
| Glass Transition Temperature (Tg) | 47°C |
| Shear Modulus | 1260 MPa |
| Tensile Modulus | 2100 MPa |
| Tensile Strength | 30 MPa |
| Elongation at Break | 6 % |
| Flexural Modulus | 2300 MPa |
| Flexural Strength | 53 MPa |
| Thermal Conductivity | 0.6 W/mK |
| Thermal Coefficient (α1 / α2) | 70 / 135 ppm/K |
| Hardness (Shore D) | 80 |
| Max. Service Temperature | IEC 60085 Class F |
| Flammability | UL 94 V-0 (6 mm) |
| Water Absorption | 0.1 % (1d/23°C), 0.28 % (10d/23°C), 0.3 % (30min/100°C) |
| Property | Value |
|---|---|
| Dielectric Strength (2 mm) | 29 kV/mm |
| Dielectric Constant (εr, 50 Hz, 25°C) | 4.5 |
| Dielectric Loss (tan δ, 50 Hz, 25°C) | 3 % |
| Volume Resistivity (25°C) | 10¹⁴ Ω·cm |
| Electrolytic Corrosion | Grade A/1 |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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