Secondary insulation materials provide several essential benefits in e-motor designs. Impregnation, particularly potting, can greatly lower operating temperature, resulting in higher power output, longer motor life and better reliability. It also helps to reduce mechanical stress, protect windings from contaminants (water, dust, chemicals), and provide an optimal insulation structure.
Huntsman offers a wide range of heat-conductive encapsulants for electrified powertrains under our ARALDITE® brand, all of which meet the highest temperature endurance requirements of car manufacturers. Our potting resin supports and strengthens rotor coils under high rotation speeds (>15,000 rpm) and high temperatures. It also offers excellent crack resistance, fast vacuum processing for reliable void-free electrical insulation, noise damping for acoustic benefits, and complete protection against aggressive chemicals.
Glass transition temperature (Tg):
200°C
Thermal conductivity:
0.6 W/(m.K)
Suitable for:
Developed for rotor potting. Very low CTE, highest modulus and strength between -40°C and + 180°C. Very good intra-coil impregnation, high Tg. Outstanding resistance at elevated temperatures and high rotation speed.
Glass transition temperature (Tg):
200°C
Thermal conductivity:
0.95 W/(m.K)
Suitable for:
Highest modulus and strength between -40°C and + 180°C. Very good intra-coil impregnation. Developed for rotor potting with improved heat dissipation.
Glass transition temperature (Tg)
200°C
Thermal conductivity
0.2 W/(m.K)
Suitable for:
High strength and modulus supporting the rotor structure during operation within the entire operation range. Low CTE, outstanding dimensional stability at high loads. Low viscosity and long pot life for versatile processing, e.g. filament winding.
Glass transition temperature (Tg):
170°C
Thermal conductivity:
0.6 W/(m.K)
Suitable for:
Very good impregnation. Developed for rotor potting. Toughened with reinforcing fillers for superior crack and thermal shock resistance.
Our products are formulated to offer characteristics (viscosity, mix ratio, gel time) that make it easy to optimize and automate production processes. As a globally established automotive supplier, we can offer local and global supply and support for custom-tailored solutions. Huntsman has close relationships with leading equipment suppliers, and our experts work with them to help you develop and implement customer-specific systems for fast, efficient and repeatable processing.
Battery Electronics
We offer casting and impregnating resin systems for batteries and improve battery efficiency, safety, and production cost.
View Battery ElectronicsStator for E-Motor
We offer heat-conductive encapsulants for electric motors, all of which meet the highest temperature endurance requirements of car manufacturers.
View Stator for E-MotorRotor for E-Motor
Our secondary insulation materials guarantee a strong and durable fixing of rotor coils, even when operating under high rotation speeds and challenging peak temperatures.
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Our encapsulation technology can substantially improve the performance and cost of power electronics devices and is ready for next-generation high-voltage applications.
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We produce epoxy systems specially designed to insulate high-voltage coil components, thus reducing transformer and inductor hot spots and extending reliability and lifespan.
View Ignition Coil
Discover our ARALDITE® encapsulants for electric motors, battery and power electronics.
As the electric vehicle industry moves to 800-volt architectures, e-motors will be expected to be able to carry higher currents without overheating. Epoxy technology for secondary insulation can meet the challenging new requirements, including improved thermal management, void-free electrical insulation, high crack resistance and superior mechanical performance.
ARALDITE® CW 30386 resin / HW 30387 hardener belongs to a new generation of vacuum casting resins. It offers high glass transition temperature (Tg) and low viscosity. It guarantees strong and durable fixing of rotor coils even when operating under high rotation speeds and challenging peak temperatures. It is fully compatible with new sustainable rotor designs that avoid rare earth permanent magnets.
A low-viscosity resin can thoroughly penetrate even the tightest coil and slot windings, eliminating air gaps and resulting in consistent insulation performance. In almost all situations, applying a potting solution will avoid the need for previous varnishing (VPI), simplifying the manufacturing process and reducing costs.
