Outdoor Epoxy Resin UV-Resistant APG / Vacuum Casting High-Voltage Insulation

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

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

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.

Shanghai Wenyou Industry Co., Ltd.mainly engaged in the advanced materialsof MV and HV insulation products for indoorand outdoor use, both suitable for APG andvacuum casting.

Our wide range of products includes epoxy resin, flame retardant resin, curing agents, outdoor modifiers, toughening agents, epoxy paste, demoulding agents, and fillers.

We have obtained ISO9001, ISO14001, SGS, and UL certifications, and our products comply with ROHS and REACH safety regulations.

Our high-quality products are used in high voltage electrical insulation applications and are exported globally. We are committed to providing stable products and excellent service to the global electricity industry.

High Quality Electrical Raw Materials
Epoxy resin

Release agent

Silica powder
Hardener
Color paste
Flexibilizer