Shanghai Wenyou Industry Co., Ltd.
| Payment Terms | L/C,T/T,Western Union,MoneyGram |
| Application | Electrical Insulation |
| Feature | Water Resistance,high quality |
| Heat Resistance | High |
| Impact Strength | High |
| Flammability | HB Class |
| Chemical Resistance | Excellent |
| Brand Name | WENYOU |
| Model Number | LE-9219K/LH-9219K |
| Certification | REACH/RoHS/UL/ISO/CE |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C,T/T,Western Union,MoneyGram | Application | Electrical Insulation |
| Feature | Water Resistance,high quality | Heat Resistance | High |
| Impact Strength | High | Flammability | HB Class |
| Chemical Resistance | Excellent | Brand Name | WENYOU |
| Model Number | LE-9219K/LH-9219K | Certification | REACH/RoHS/UL/ISO/CE |
| Place of Origin | CHINA | ||
| High Light | Epoxy Resin for Switchgear Bushings Transformers ，Epoxy Resin for Transformers | ||
The LE-9219K/LH-9219K is a high-performance two-component epoxy resin system designed for medium/high-voltage electrical insulation (12–40.5 kV). Formulated with modified BPA epoxy resin (LE-9219K) and carboxylic anhydride hardener (LH-9219K), it delivers exceptional thermal shock resistance, superior crack resistance, and H-class thermal stability (IEC 60085). Ideal for vacuum casting or APG processes, it ensures reliability in critical indoor electrical components.
| Feature | Advantage |
|---|---|
| Modified BPA Epoxy + Anhydride Hardener | Enhanced thermal stability & mechanical strength |
| Optimized for Vacuum Casting/APG | Flexible processing, adaptable to client production methods |
| Superior Crack Resistance | Withstands thermal cycling, reducing failure risks |
| HB Flammability Rating (UL94) | Meets strict safety standards for electrical applications |
| High Dielectric Strength | ≥25 kV/mm (1mm thickness, IEC 60243-1) |
| Low Water Absorption | 0.10–0.20% (23°C/10 days) for long-term insulation integrity |
| H-Class Thermal Endurance | Sustained performance up to 150°C |
Perfect for insulating components in indoor high-voltage systems:
Switchgear contact boxes (12–40.5 kV)
Bushings, insulators, & encapsulation
Transformers, sensors, & circuit breakers
HV insulation products requiring precision casting
*Cured system: LE-9219K/LH-9219K/Silica powder = 100:100:350 @ 140°C/10h*
| Property | Value | Standard |
|---|---|---|
| Glass Transition Temp (Tg) | 105–120°C | ISO 11357-2 |
| Tensile Strength | 65–85 MPa | ISO 527 |
| Flexural Strength | 105–140 MPa | ISO 178 |
| Volume Resistivity | 10¹⁵ Ω·cm | IEC 62631-3-1 |
| Arc Resistance | 181–198 sec | IEC 61621 |
| Breakdown Strength | ≥25 kV/mm | IEC 60243-1 |
| Dielectric Constant | 3.0–4.0 (50Hz) | IEC 60250 |
| Water Absorption | 0.10–0.20% (23°C/10d) | ISO 62 |
| Tracking Resistance | ≥600 V | IEC 60112 |
| Curing Shrinkage | 0.8–1.0% | HG/T2625 |
Q1: What is the mix ratio for LE-9219K/LH-9219K?
A: Standard ratio is 100:100 pbw (resin:hardener). Filler (silica powder) added at 300–380 pbw.
Q2: How should the hardener be stored?
A: Store in sealed containers at 6–35°C. Avoid moisture exposure. If crystallized, preheat to 70–80°C and stir before use.
Q3: What curing process is recommended?
A: Two options:
Vacuum Casting: Cure 70–80°C/3–5h + 90–100°C/2–4h; Post-cure 130°C/12h.
APG: Mold temp 130–160°C; Post-cure 130–150°C/10–12h.
Q4: Is this system suitable for outdoor use?
A: Designed for indoor electrical insulation only. Hydrophobicity class HC1 (IEC TS 62073).
Q5: What safety measures are required during handling?
A: Mandatory: gloves, goggles, protective clothing. Use ventilation (3–5 air renewals/hour). Avoid skin contact—wash immediately if exposed.
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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