Ignition Coil

Ignition Coil

Automotive ignition coils are cast in filled epoxy resins, which penetrate voids within the winding and provide electrical insulation and heat conduction. Potting of ignition coils reduces transformer and inductor hot spots and extends component reliability and lifespan. Huntsman produces epoxy systems specially designed to insulate and protect high-voltage coil components.

Improved Endurance for Ignition Coils

Huntsman resin systems deliver a robust potting/curing process. This translates to improved performance in thermal endurance, thermal cycling and thermal shock, better electrical properties, greater long-term reliability, higher mechanical strength, better crack resistance and fracture toughness, and a lower coefficient of thermal expansion, which results in less stress and shrinkage.

ARALDITE® encapsulation systems exhibit excellent electrical and mechanical properties for long-term reliability at temperatures up to 220° C.

They are suitable for impregnation of fine wire windings as small as 30 μm, and exhibit high dielectric strength and high voltage resistance (up to 30 kV/mm). Their low viscosity is ideal for producing effective insulation between high-voltage ignition coil components, and they have a low coefficient of thermal expansion to resist stress cracking in electronics applications.

ARALDITE® resin systems are designed to enable mass production with short cycle times. They feature short curing times (currently between four and six hours) are compatible with integrated Printed Circuit Boards (PCB), and exhibit good adhesion to thermoplastic housings and bobbins.

The Right Resin Systems for Your Electronic Components

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Stator for E-Motor

Stator for E-Motor

We offer heat-conductive encapsulants for electric motors, all of which meet the highest temperature endurance requirements of car manufacturers.

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Rotor for E-Motor

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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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Power Electronics

Power Electronics

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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Ignition Coil

Ignition Coil

We produce epoxy systems specially designed to insulate high-voltage coil components, thus reducing transformer and inductor hot spots and extending reliability and lifespan.

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Frequently Asked Questions

What process is used for impregnation and potting of ignition coils?

ARALDITE® encapsulation systems can quickly fill gaps of one millimeter, or even less, between fine wire windings in ignition coils. The vacuum potting process is used.

What specific Huntsman products are recommended for impregnation and potting of ignition coils?

ARALDITE® CW 5725-6 resin / ARADUR® HY 5726-2 hardener is a high-performance REACH-compliant solution tailored to applications in which easy processing is a top priority. ARALDITE® CW 5742 resin / ARADUR® HY 5726-2 hardener is a high-Tg REACH-compliant solution optimized for ignition coils that require high thermal endurance.

The Right Solution for Your Manufacturing Process

Discover our electronics processes and decrease your production waste and processing time.

Processes for Electronics

Encapsulation Resin Systems

Our ranges of epoxy and polyurethane encapsulant chemistries meet the most stringent requirements for electronics applications in the electrified powertrain.

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