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Brand Name : wenyou
Model Number : 9204
Certification : ISO9001, ISO14001, SGS, and UL
Place of Origin : China
MOQ : 20kg/pail as sample
Price : Negotiable
Payment Terms : Normally L/C,T/T
Supply Ability : Plenty of raw material in stock
Delivery Time : 7 -10 work days
Packaging Details : 20kg/pail, 220kg/barrel, 1200kg/tank
Classification : Double Components Adhesives
Usage : Bushings, switchgears,dry-type transformers, and other insulation products.
Application : Indoor electrical insulators for medium and high voltage applications
Viscosity at 25°C : 5000 - 7000mPa.s
Density at 25°C : 1.13 - 1.18g/cm3
Vapor Pressure at 25°C : ≤ 0.01Pa
Flash point : around 130°C
Epoxy Value : 5.0 - 5.4Eq/kg
Description : Excellent mechanical and electrical properties epoxy resin for insulators / bushings
LE-9204/LH-9204: UL 94 V-0 Low-Viscosity Epoxy for Transformer Coil Impregnation & Bushings
LE-9204/LH-9204 is a low-viscosity, flame-retardant epoxy system engineered for void-free impregnation of transformer coils and high-voltage bushings. Featuring UL 94 V-0 certification and exceptional flow characteristics, it penetrates complex winding structures to eliminate air pockets, prevent partial discharge, and enhance dielectric strength. Ideal for VPI processes, APG molding, or vacuum casting of dry-type transformers, switchgear, and indoor insulation components up to 40.5 kV.
Property | Advantage |
---|---|
Ultra-Low Viscosity | Deep penetration into coil windings for void-free insulation |
Flame Safety | UL 94 V-0 certified – critical for dry-type transformers & indoor switchgear |
Thermal Resilience | Withstands >1,000 thermal shock cycles (-40°C to +150°C) |
Electrical Integrity | High CTI (>600 V) and dielectric strength (>18 kV/mm) |
Process Flexibility | Compatible with VPI, APG, and vacuum gravity casting |
Custom Formulation | Adjust LF-630 flexibilizer (0-20 pbw) for stress reduction |
Dry-type transformers: Coil impregnation and encapsulation
Medium-voltage switchgear (up to 40.5 kV)
Bushings and insulators for indoor applications
Sensor coils and reactor windings
PCB insulation barriers
Component | Part | Ratio (pbw) | Function |
---|---|---|---|
Epoxy Resin | LE-9204 | 100 | BPA-based liquid resin |
Anhydride Hardener | LH-9204 | 85 | Carboxylic acid curing |
Flexibilizer | LF-630 | 0–20 (opt.) | Reduces brittleness |
Accelerator | LZ-622 | 0.2–1.5 | Controls cure speed |
Silica Filler | Powder | 320–390 | Enhances mechanicals |
Color Paste | LC Series | 3 (opt.) | Visual identification |
Cured Properties:
Viscosity (mixed): <500 mPa·s (enables deep impregnation)
UL 94 Rating: V-0
Comparative Tracking Index: >600 V
Dielectric Strength: >18 kV/mm
Thermal Shock Resistance: Passes IEC 60137 cycling tests
Vacuum Pressure Impregnation (VPI):
Optimal for transformer coils – ensures void-free penetration
Automatic Pressure Gelation (APG):
High-volume production of bushings/insulators
Vacuum Gravity Casting:
Bubble-free encapsulation for complex geometries
Void Elimination: Ultra-low viscosity removes air pockets in windings
Fire Safety: Critical UL 94 V-0 rating for indoor electrical equipment
Flexibility Control: Tune toughness with LF-630 flexibilizer
Accelerated Curing: LZ-622 enables rapid production cycles
Industrial Compliance: Meets IEEE C57.12.01 for dry-type transformers
Package Image
Shipment image
Example application image
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Low Viscosity Flame Retardant Epoxy for Void-Free Transformer Coil Impregnation Images |