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

Sanmu E-31 Bisphenol A Epoxy Resin

Sanmu E-31 is a high-purity Bisphenol A epoxy resin from Sanmu’s E-series, offering excellent adhesion, chemical resistance and thermal stability. Widely used in composites, coatings and electrical encapsulation, it features low viscosity, good mechanical strength and reliable curing performance with amines or anhydrides. Meets industrial standards for demanding applications.
  • sanmu e 31 bisphenol a epoxy resin_ac780b57
  • sanmu e 31 bisphenol a epoxy resin_ac780b57

Features Of Sanmu E-31 Bisphenol A Epoxy Resin

  1. High purity bisphenol A-based epoxy resin with consistent epoxide equivalent weight (EEW) for reliable reactivity.

  2. Excellent thermal stability and glass transition temperature (Tg) after curing, supporting demanding service environments.

  3. Low viscosity at elevated temperatures, enabling efficient processing in casting, impregnation, and coating applications.

  4. Superior adhesion to metals, composites, and cured polymer substrates without requiring specialized primers.

  5. Compatible with a broad range of amine, anhydride, and phenolic hardeners for formulation flexibility.

Typical Applications Of Sanmu E-31 Bisphenol A Epoxy Resin

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

  2. Structural adhesives in aerospace and automotive composite bonding.

  3. Protective coatings for offshore oil & gas infrastructure and chemical processing equipment.

  4. Encapsulants and potting compounds for power electronics and LED modules.

  5. Matrix resin in fiber-reinforced laminates for wind turbine blades and industrial tooling.

Specifications Of Sanmu E-31 Bisphenol A Epoxy Resin

Chemical TypeBisphenol A diglycidyl ether (DGEBA)
Product FormClear to pale yellow viscous liquid
AppearanceHomogeneous, transparent, free from gel particles or sediment
Epoxide Equivalent Weight (EEW)185–192 g/eq
Viscosity (25°C)12,000–16,000 mPa·s
Chlorine Content (Total)≤ 1,200 ppm
Softening Point12–16°C
Color (Gardner)≤ 3


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