Low Viscosity Flame Retardant Epoxy Resin for Electrical Insulating Applications with UL 94 V-0 Certification
Price:
Negotiable
MOQ:
20kg/pail as sample
Delivery Time:
7 -10 work days
Brand:
wenyou
Product Description
Low Viscosity Flame Retardant Epoxy for Current Transformer
LE-9204/LH-9204: UL 94 V-0 Low-Viscosity Epoxy for Transformer Coil Impregnation & Bushings
Product Overview
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.
Key Features & Benefits
| 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 |
Applications
- 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
Technical Formulation
| 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
Processing Methods
- 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
Why Choose This System?
- 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
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Get in Touch
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Company
Shanghai Wenyou Industry Co., Ltd.
Location
No.8,Lane 328, Minle Rd. Fengxian 201419,Shanghai P.R.China
Contact Person
Hope