Araldite CW 5725 Resin and Hardener Aradur HY 5726 are two components of epoxy potting compound for car ignition coils which would have to resist to shock and bear a lot of heat during the process of transforming the battery’s low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel.
FEATURES:
- Impregnation of fine wire windings (30μm)
- High operating temperature 150-180°C / >1000 hrs
- Good resistance to Thermal Shock / Thermal mismatch (-40° / +140°C)
- Crack resistance
- Adhesion to thermoplastic housing /bobbin
- Compatibility with integrated PCB
- Dielectric Strength, Dielectric constant
- Manufacturing process: Vacuum Potting
- Short Cycle times (10´000 parts per day and equipment)
- Fast filling (gaps 1 mm)
- Short curing (current 4 – 6hrs, future 0.5 – 2hrs)
APPLICATIONS:
- Car ignition coils
- Vacuum casting
| ARALDITE CW 5725 | Viscosity | at 60°C | ISO 12058 | mPa s | 6300 |
| Specific gravity | at 25°C | DIN 53 217 | g/cm³ | 1.91 | |
| Flash point | DIN 1523 | °C | >200 | ||
| Filler content | % | 65 | |||
| As supplied form | black, highly viscous liquid | ||||
| Hazardous decomposition products | Hazardous decomposition products Carbon monoxide, carbon dioxide and other toxic gases and vapour if burned | ||||
| Disposal | Regular procedures approved by national and/or local authorities | ||||
| Hardener HY 2919 | Viscosity | at 25°C | ISO 12058 | mPa s | 70 |
| Specific gravity | at 25°C | DIN 53 217 | g/cm³ | 1.19 | |
| Flash point | ISO 1523 | °C | 160 | ||
| As supplied form | clear, yellowish liquid | ||||
| Hazardous decomposition products | Carbon monoxide, carbon dioxide and other toxic gases and vapours if burned | ||||
| Disposal | Regular procedures approved by national and/or local authorities | ||||