Shanghai Wenyou Industry Co., Ltd.
| 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 |
| Brand Name | wenyou |
| Model Number | 9204 |
| Certification | ISO9001, ISO14001, SGS, and UL |
| Place of Origin | China |
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Product Specification
| 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 | Brand Name | wenyou |
| Model Number | 9204 | Certification | ISO9001, ISO14001, SGS, and UL |
| Place of Origin | China | ||
| High Light | Transformer Coil Impregnation Flame Retardant Epoxy ，Void-Free Flame Retardant Epoxy ，Low Viscosity Flame Retardant Epoxy | ||
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
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Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2008
Total Annual:
15000000-25000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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, toughe... 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, toughe...
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