Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Mitsui EPOKEY 820-40CX Epoxy Resin

Mitsui EPOKEY 820-40CX is a high-performance liquid epoxy resin from Mitsui Chemicals’ EPOKEY series, designed for demanding electrical insulation and composite applications. It offers excellent flowability, low viscosity, superior adhesion, and reliable thermal stability. Widely used in LED encapsulation, potting compounds, and fiber-reinforced plastics due to its balanced reactivity and mechanical strength.
  • mitsui epokey 820 40cx epoxy resin_2bec7bd4
  • mitsui epokey 820 40cx epoxy resin_2bec7bd4

Features Of Mitsui EPOKEY 820-40CX Epoxy Resin

  1. High-performance bisphenol-F type epoxy resin offering superior chemical resistance and thermal stability.

  2. Low viscosity formulation enables excellent processability for impregnation, casting, and coating applications.

  3. Excellent adhesion to diverse substrates including metals, composites, and cured thermosets.

  4. Consistent reactivity profile ensures reliable curing behavior with standard amine and anhydride hardeners.

  5. Low volatile organic compound (VOC) content, supporting environmentally responsible manufacturing practices.

Typical Applications Of Mitsui EPOKEY 820-40CX Epoxy Resin

  1. Electrical insulation systems for medium- and high-voltage transformers and reactors.

  2. Encapsulation and potting of power electronics, including IGBT modules and EV inverter components.

  3. Structural adhesive formulations for aerospace composite bonding and repair.

  4. High-durability protective coatings for offshore and industrial steel infrastructure.

  5. Matrix resin in filament-wound pressure vessels and fiber-reinforced polymer (FRP) tanks.

Specifications Of Mitsui EPOKEY 820-40CX Epoxy Resin

Chemical TypeBisphenol-F based epoxy resin
Product FormLiquid
AppearancePale yellow to amber transparent liquid
Epoxy Equivalent Weight (EEW)175–185 g/eq
Viscosity at 25°C12,000–16,000 mPa·s
Chloride Content≤ 500 ppm
Softening PointNot applicable (liquid at room temperature)
Primary ApplicationsElectrical insulation, encapsulation, structural composites, protective coatings


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