| Epoxy resin | | 100pbw |
| Hardener | LH-9516 | 100pbw |
| Filler | Silica | 350-400pbw |
| Color paste | LC- | 3pbw |
Performance
A two component saturated epoxy resin system without premixed filler, liquid at room temperature.
It is suitable for both APG injection process and vacuum casting process.
Excellent UV resistance, excellent thermal and thermal shock resistance, excellent environmental resistance and excellent electromechanical performance.
Application
Outdoor high-voltage electrical insulation parts such as: insulators, transformers and other insulation products.
Physical and chemical indicators
Resin LE-9516 is a modified saturated Curing agent LH-9516 is a modified weathering
epoxy resin system anhydride curing agent.
| 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 | | | |
Process
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 |
Gel time
LE-9516:LH-9516=100:100
| Temperature | Gel time |
| at 120℃ | 20-40mins |
| at 140℃ | 9-18mins |
| at 160℃ | 4-8mins |
Mechanical andphysical properties
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 | | |
Key Features & Advantages:
- 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.
