Electrical Insulation Coating Powder
EPICOAT-E is a one part Epoxy Resin Powder formulation specially designed for insulation coating of Slot cells of motor Stators and Rotors particularly of micro motors e.g. two wheeler auto start motors, magnetoes & hand tool armatures. The powder also could be used for motors coil impregnation.
Characteristics of the Powder
- High heat resistance, high Tg
- Good adhesion and edge Covering
- Better abrasion and Cut through
- Excellent Electrical Properties
- Moderate temperature curing, no post cure
- Suitable for fluidized & electro fluidized bed
- coating applications
- Excellent cloud formation
Typical Powder Properties
| Properties | Unit | Specification |
|---|---|---|
| Appearance | Free Flowing Powder | |
| Bulk Density | g / cc | 0.7 - 0.8 |
| Gel Time at 150°C | s | 40-50 |
| Gel Time at 200°C | s | 10-20 |
| Partical Size Distribution Through 150 micron | 100% | |
| Partical Size Distribution Through 050 micron | 20% | |
| Inclined Plate Flow 150°C/45° (2g/20 ø) | mm | 15-30 |
Coating Conditions
- Fluidised bed coating (FBC)
- Pre-heat temperature of the object : 180°C - 220°C
- Dip time of object : 1-10 seconds
- Cure Schedule : 150°C / 30 min or 180°C /10 min
Properties of cured material
| Finish | - | Smooth-Glossy |
| Specific Gravity | g/cc | 1.6 |
| Glass Transition Point Tg. | °C | 110 |
Electrical Properties of Cured Material
| Dielectric strength | Kv / mm | >30 |
| Volume Resistivity | cm | 5 x 1015 |
| Insulation Resistance | - | 1014 |
| Dielectric constant | - | 4 |
| Dissipation Factor | Tan ∂ | 1 x 10-3 |
Storage of Powder
- Powder should be stored at 20°C or below in closed containers. Storage area should be dry, free from atmospheric moisture. After removing powder from cold storage allow to attain the ambient temperature in closed containers before opening and using to avoid moisture contamination. The shelf life of powder is 3 months at 20°C
Packing
- EPICOAT-E is available in Green, Natural white and any other color on request in 10 kg. /15 kg. Carton pack