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

Dow DEN 438-X80 Phenolic Epoxy Resin

Dow DEN 438-X80 is a high-performance phenolic epoxy resin from Dow’s DEN series, engineered for exceptional thermal stability, chemical resistance, and adhesion in demanding composites and aerospace applications. It offers low viscosity, excellent flow, and superior dielectric properties versus standard epoxies.
  • dow den 438 x80 phenolic epoxy resin_d8a82ea7
  • dow den 438 x80 phenolic epoxy resin_d8a82ea7

Features Of Dow DEN 438-X80 Phenolic Epoxy Resin

  1. High thermal stability derived from phenolic novolac backbone for sustained performance at elevated temperatures.

  2. Enhanced chemical resistance to strong acids, alkalis, and solvents in aggressive industrial environments.

  3. High functionality (average epoxy equivalent weight ~175–195 g/eq) enabling dense crosslinking and superior mechanical rigidity.

  4. Excellent adhesion to metals, composites, and cured epoxy substrates without primer requirement.

  5. Low volatility and minimal outgassing—suitable for vacuum and aerospace-grade encapsulation applications.

Typical Applications Of Dow DEN 438-X80 Phenolic Epoxy Resin

  1. Aerospace composite matrices for primary and secondary structural components.

  2. High-performance electrical laminates in printed circuit boards (PCBs) requiring UL 94 V-0 rating.

  3. Thermal management encapsulants for power electronics and LED modules.

  4. Chemical-resistant tank linings and pipe coatings for oil & gas infrastructure.

  5. High-temperature adhesive formulations for metal-to-metal bonding in automotive powertrain systems.

Specifications Of Dow DEN 438-X80 Phenolic Epoxy Resin

Chemical TypePhenolic Novolac Epoxy Resin
Product FormOff-white to light tan solid pellets
AppearanceFree-flowing crystalline granules
Epoxy Equivalent Weight (EEW)175–195 g/eq
Softening Point85–95 °C
Volatility (Loss on Heating at 150 °C, 2 hrs)< 0.5 wt%
Chlorine Content< 100 ppm
Key FeaturesHigh Tg, low moisture absorption, excellent char yield


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