The LE-184/LH-8504 epoxy system is a weather-resistant, multi-component formulation engineered for outdoor high-voltage electrical insulation. Featuring modified BPA epoxy (LE-184), anhydride hardener (LH-8504), flexibilizer (LF-660), and accelerator (LZ-622), it delivers exceptional UV/erosion resistance, thermal shock stability, and superior dielectric performance. Ideal for APG or vacuum casting processes in harsh environments.
Key Features & Advantages
| Feature |
Advantage |
| UV & Weather Resistance |
Withstands outdoor exposure, prevents erosion & yellowing |
| Flexibilizer LF-660 (0-20 pbw) |
Enhances crack resistance under thermal cycling |
| Accelerator LZ-622 (0-0.4 pbw) |
Speeds curing for high-volume production |
| APG & Vacuum Casting Compatible |
Adapts to existing manufacturing setups |
| High Dielectric Strength |
25-35 kV/mm (IEC 60243-1) for outdoor insulators |
| Low Water Absorption |
0.10-0.20% (23°C/10d) ensures long-term integrity |
| Solvent-Free |
Eco-friendly, low-VOC processing |
Applications
Built for outdoor electrical components:
HV bushings, insulators & surge arresters
Transformer encapsulation
Outdoor switchgear (12-40.5 kV)
Solar/Wind energy infrastructure
Railway electrification components
Key Performance Data
*Cured system: LE-184/LH-8504/Silica=100:90:350 | Cure: 140°C×2h + 130°C×10h*
Mechanical & Thermal Properties
| Property |
Value |
Standard |
| Tensile Strength |
60-85 MPa |
ISO 527 |
| Flexural Strength |
100-140 MPa |
ISO 178 |
| Impact Strength |
8-16 kJ/m² |
ISO 179 |
| Glass Transition (Tg) |
65-105°C |
ISO 11357-2 |
| Thermal Conductivity |
0.7-0.9 W/m·K |
ISO 8894-1 |
| Decomposition Temp |
>320°C |
ASTM E2402 |
Electrical & Safety Properties
| Breakdown Strength (3mm) | 25-30 kV/mm | IEC 60243-1 |
| HV Arc Resistance | 185-195 sec | IEC 61621 |
| Tracking Resistance | CTI>600 (Solution A/B) | IEC 60112 |
| Electrolytic Corrosion | Grade A-1 | IEC 60426 |
| Flammability | HB Rating | UL94 |
Frequently Asked Questions (FAQ)
Q1: What’s the role of LF-660 and LZ-622?
A: LF-660 (0-20 pbw) improves flexibility & crack resistance. LZ-622 (0-0.4 pbw) accelerates curing – critical for APG production.
Q2: How should I store components?
A: Store in sealed containers at 18-25°C. Shelf life: 24 months. Avoid moisture – hardener is humidity-sensitive.
Q3: What processing methods are supported?
A: Optimized for:
APG: Mold temp 130-150°C | Gel time 10-50 min
Vacuum Casting: Cure 80-100°C | Gel time 3-6h
Post-cure: 130-140°C×6-10h for all methods
Q4: How is filler pre-treated for HV applications?
A: Silica filler must be pre-dried (moisture ≤0.2%). Use thin-film degassing mixers for consistent dispersion.
Q5: Is this system suitable for coastal environments?
A: Yes! UV resistance + low water absorption (0.10-0.20%) prevents salt corrosion & tracking.
Product Tags:
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Outdoor Epoxy Resin UV-Resistant APG / Vacuum Casting High-Voltage Insulation Images
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