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

EP-4901E Epoxy Resin

EP-4901E Epoxy Resin is a high-performance bisphenol-A based epoxy resin from the EP-4900 series by Changchun Thermal Resins. It offers excellent mechanical strength, thermal stability, and electrical insulation. Widely used in electronic encapsulation, structural adhesives, and composite matrices. Low viscosity ensures easy processing and superior wetting. Compliant with RoHS and REACH standards. Ideal for demanding industrial applications requiring reliability and consistency.
  • ep 4901e epoxy resin_b8b1092a
  • ep 4901e epoxy resin_b8b1092a

Features Of EP-4901E Epoxy Resin

  1. High reactivity with amine and anhydride hardeners, enabling rapid cure at ambient or elevated temperatures.

  2. Excellent adhesion to metals, composites, and treated plastics without requiring aggressive surface priming.

  3. Low viscosity (8,000–12,000 cP at 25°C) for superior flow, wetting, and void-free impregnation in fiber-reinforced systems.

  4. Good thermal stability with glass transition temperature (Tg) up to 165°C post-cure using standard diamine formulations.

  5. Low chloride content (<500 ppm), ensuring high electrical insulation performance and corrosion resistance in electronic encapsulants.

Typical Applications Of EP-4901E Epoxy Resin

  1. Electrical potting and encapsulation of power modules, transformers, and high-voltage sensors.

  2. Structural adhesive formulation for aerospace composite bonding and automotive lightweight assemblies.

  3. Matrix resin for carbon fiber and fiberglass prepregs used in wind turbine blades and sporting goods.

  4. Coating binder for corrosion-resistant industrial linings and tank interior protection.

  5. Underfill material for flip-chip and advanced semiconductor packaging requiring low stress and CTE control.

Specifications Of EP-4901E Epoxy Resin

Chemical TypeBisphenol-F based liquid epoxy resin
Product FormClear to pale yellow viscous liquid
AppearanceHomogeneous, free from gels or particulates
Epoxy Equivalent Weight (EEW)175–185 g/eq
Viscosity (25°C)8,000–12,000 cP
Chloride Content<500 ppm
Softening Point12–18°C
Storage Stability12 months at <25°C in sealed original container


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