High Tg Flame Retardant Epoxy Encapsulant for Transformer Insulation & Protection

LE-9265/LH-9265: High Tg UL 94 V-0 Epoxy for HV Insulators & Bushings | APG/Vacuum Casting

Product Overview

LE-9265/LH-9265 is a modified cycloaliphatic epoxy resin system engineered for high-voltage insulators, bushings, and contact boxes (12–40.5 kV). Combining UL 94 V-0 flame resistance, extreme weather durability, and high thermal stability (Tg >150°C), this unfilled liquid resin delivers void-free insulation for outdoor power infrastructure. Compatible with Automatic Pressure Gelation (APG) and vacuum casting, it ensures superior dielectric strength (>18 kV/mm) and CTI >600 V for decades of reliable service.

Key Features & Benefits

Applications

• 12–40.5 kV switchgear: Contact boxes, cable terminations

• Outdoor bushings & insulators

• Transformer bushings and surge arresters

• Railway/utility power distribution insulation

Technical Specifications

Cured Properties:

• Glass Transition Temp (Tg): >150°C

• Dielectric Strength: >18 kV/mm

• Comparative Tracking Index (CTI): >600 V

• UL 94 Rating: V-0

• Thermal Shock Resistance: >1,000 cycles (-40°C to +125°C)

Processing Methods

1. Automatic Pressure Gelation (APG):

   • Fast, low-waste production for high-volume insulator molding.

2. Vacuum Gravity Casting:

   • Bubble-free encapsulation for complex bushing geometries.

Why Choose This System?

• Weatherproof: Cycloaliphatic base resists yellowing/erosion in harsh environments.

• Safety Compliance: Meets UL 94 V-0, IEC 60137, and ASTM D2303 standards.

• Customizable: Adjust filler ratios (WY-12X) for viscosity/mechanical needs.

• Zero Voids: Ensures partial discharge-free insulation for HV applications

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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