LE-9516/LH-9516 Transformer Epoxy Resin Outdoor CT/VT Electrical Insulation
| Attribute | Value |
|---|---|
| Viscosity | 200-500 |
| Process | APG & Vacuum Casting |
| Keywords | electric epoxy resin |
| Thermal Decomposition | ＞320°C |
| Adhesion Strength | Strong |
| Usage | Electrical insulation |
| Component | Type | Amount |
|---|---|---|
| Epoxy resin | LE-9516 | 100pbw |
| Hardener | LH-9516 | 100pbw |
| Filler | Silica | 350-400pbw |
| Color paste | LC- | 3pbw |
A two component saturated epoxy resin system without premixed filler, liquid at room temperature.
- Suitable for both APG injection process and vacuum casting process
- Excellent UV resistance
- Excellent thermal and thermal shock resistance
- Excellent environmental resistance
- Excellent electromechanical performance
Outdoor high-voltage electrical insulation parts such as: insulators, transformers and other insulation products.
Resin LE-9516 is a modified saturated epoxy resin system. Curing agent LH-9516 is a modified weathering anhydride curing agent.
| Resin LE-9516 | Curing Agent LH-9516 | ||||
|---|---|---|---|---|---|
| Property | Unit | Standard | Property | Unit | Standard |
| Appearance | Visual | Transparent-yellow liquid | Appearance | Visual | Transparent-yellow liquid |
| Epoxy value | Eq/kg | 4.0-4.5 | Viscosity at 25℃ | mPa.s | 150-400 |
| Viscosity at 25℃ | mPa.s | 500-1500 | Density at 25℃ | g/cm3 | 1.17-1.24 |
| Density at 25℃ | g/cm3 | 1.16-1.20 | VP | Pa | About 0.5 |
| VP at 25℃ | Pa | <0.01 | Flash point | ℃ | About 140 |
| Flash point | ℃ | About 135 | |||
Epoxy resin LE-9516, curing agent LH-9516 and a certain amount of filler can be mixed according to the following curing process after fully mixing under vacuum conditions:
| Processing parameters | Automatic Pressure Gelation | Vacuum casting |
|---|---|---|
| Epoxy Resin/Hardener mixing temperature | 40℃/1-2h | 50-60℃/1-1.5h |
| Feeding method | Pressure(0.5-5bar) | Vacuum (casting pot) |
| Mold temperature | 130-150℃ | 105℃/4-6h |
| Gelation time | 10-50mins | 80℃/4h+100℃/2h+120℃/2h |
| Post-curing | 130-140℃×6-10h | 130-140℃×6-10h |
LE-9516:LH-9516=100:100
| Temperature | Gel time |
|---|---|
| at 120℃ | 20-40mins |
| at 140℃ | 9-18mins |
| at 160℃ | 4-8mins |
Test system: Resin LE-9516 / curing agent LH-9516 / silica flour=100/100/400
Curing conditions: 120°C × 4hours +140°C × 8hours
Note: The following performance data are measured according to the national standard and are for user reference only. The specific application data should be determined according to the actual conditions of the user.
| Properties | Typical results | Properties | Typical results |
|---|---|---|---|
| Tg(DSC) | 60-80℃ | Thermal decomposition temperature | >320℃ |
| Tensile strength | 60-80N/mm2 | Water absorption rate (23°C × 10 days) | 0.10-0.20 %by wt. |
| Flexural strength | 100-130N/mm2 | Water absorption rate (100°C × 60 minutes) | 0.08-0.15 %by wt. |
| Compressive strength | 140-190N/mm2 | Surface resistivity | 1014 Ω |
| Impact strength | 8-16kJ/m2 | Volume resistivity | 1015 Ω.cm |
| Curing shrinkage | 0.8-1.0% | Dielectric strength | 31 kv/mm |
| Flame resistance (4mm) | HB level | Dielectric loss | 0.02 |
| Thermal conductivity | 0.8-0.9W/mk |
- Outdoor Durability: Excellent UV, thermal shock, and weather resistance for long-term reliability.
- High Dielectric Strength: 31kV/mm insulation ensures safe operation in high-voltage applications.
- Thermal Stability: Withstands temperatures up to 320°C (thermal decomposition point).
- Low Viscosity: Optimized flow (150-400 mPa*s at 25°C) for thorough component coverage.
- Fast Curing: Gel times as short as 4-8 minutes at 160°C for efficient production cycles.
- Encapsulation of outdoor CT/VT coils
- Insulators for high-voltage transformers
- APG injection-molded electrical components
- Protective coatings for substation equipment
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.