Name: Low Viscosity Flame Retardant Epoxy Resin for Electrical Insulating Applications with UL 94 V-0 Certification
Brand: Shanghai Wenyou Industry Co., Ltd.
SKU: 9204
Price: 2.30 USD
Availability: InStock

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Low Viscosity Flame Retardant Epoxy Resin for Electrical Insulating Applications with UL 94 V-0 Certification

Low Viscosity Epoxy Resin

Flame Retardant Electrical Insulating Epoxy

UL 94 V-0 Certified Transformer Epoxy

Place of Origin:

China

Brand Name:

wenyou

Certification:

ISO9001, ISO14001, SGS, and UL

Model Number:

9204

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Product Details

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

Payment & Shipping Terms

Minimum Order Quantity

20kg/pail as sample

Price

Negotiable

Packaging Details

20kg/pail, 220kg/barrel, 1200kg/tank

Delivery Time

7 -10 work days

Payment Terms

Normally L/C,T/T

Supply Ability

Plenty of raw material in stock

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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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