Huntsman offers a wide range of heat-conductive encapsulants for electric motors under the ARALDITE® brand, all of which meet the highest temperature endurance requirements of car manufacturers. ARALDITE® resin solutions deliver superior heat dissipation and can reduce operating temperature up to 25% compared to standard impregnation technology. This enables designers to choose among several performance improvements: motor size can be reduced by up to 25%, continuous power can be increased by up to 25% or motor cost can be reduced by up to 30%.
Ensuring flawless insulation and physical protection of electric motor components can vastly improve the efficiency and durability of the motor. Typically, the stator or rotor wires are first coated with a layer of varnish (primary insulation) to ensure electrical insulation. After winding, impregnating resin is applied to fill all voids within the windings and between the winding and laminations.
FEATURES:
- Hot-curing, low-viscosity impregnating resin system
- Good mechanical and dielectric properties
- Good aging resistance
APPLICATION:
- Manufacture of electrical laminates (tubes, rods, etc.)
- Impregnation of high voltage bushings, coils etc.
PROCESS METHODS:
- Filament winding
- Pultrusion
- Wet laminating
- Trickle impregnation
Typical Properties
Araldite® MY 740
Unmodified, medium-viscosity, solvent-free epoxy resin
| Viscosity at 25°C | ISO 12058 | 10’000 – 14’500 mPa.s |
| Epoxy content | ISO 3001 | 5.25 – 5.55 equiv/kg |
| Density at 25°C | ISO 1675 | 1.15 – 1.20 g/cm³ |
| Flashpoint | ISO 1523 | > 200°C |
|
Vapour pressure at 25°C at 60°C |
Knudsen |
< 0.01 Pa < 0.5 Pa |
Aradur® HY 906
Liquid, dicarboxylic anhydride
| Viscosity at 25°C | ISO 12058 | 175 – 350 mPa.s |
| Density at 25°C | ISO 1675 | 1.20 – 1.25 g/cm³ |
| Flash point | ISO 1523 | > 135°C |
|
Vapour pressure at 50°C |
Knudsen |
< 0.5 Pa |
Accelerator DY 070
Liquid, heterocyclic amine
| Viscosity at 25°C | ISO 12058 | <50 mPa.s |
| Density at 25°C | ISO 1675 | 0.95 – 1.05 g/cm³ |
| Flash point | ISO 1523 | 92°C |
|
Vapour pressure at 50°C |
Knudsen |
15 Pa |
