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D.E.N.™ 438

D.E.N.™ 438 Epoxy Novolac Resin is a general purpose, widely used epoxy novolac resin that has multi-epoxy functionality (±3.6) and is recognized as a standard for high temperature applications. This product also produces tightly cross-linked cured systems.

Used in:

  • Adhesives
  • Casting and Tooling
  • Composites
  • Can and Coil Coatings
  • Marine and Protective Coatings
  • Photocure Industrial Coatings
  • Potting and Encapsulation

Advantages:

  • Excellent for high temperature applications
  • Good thermal stability
  • Excellent reactivity and versatility
  • Offers multi-epoxy functionality (± 3.6)
  • Produces tightly cross-linked cured systems

Typical Physical Properties
These properties are typical but do not constitute specifications.

Property

Value

Method

Epoxide Equivalent Weight (g/eq)

176 – 181ASTM D-1652

Epoxide Percentage (%)

23.8 – 24.4

ASTM D-1652

Epoxide Group Content (mmol/kg)

5525 – 5680

ASTM D-1652

Color (Platinum Cobalt)

250 Max.

ASTM D-1209

Viscosity @ 51.7°C (mPa•s)

31000 - 40000

ASTM D-445

Hydrolyzable Chloride Content (ppm)

1200 Max.

ASTM D-1726

Density @ 25°C (g/ml)

1.22

ASTM D-4052

Volatiles (wt%)

0.3 Max.

ASTM E-203

Shelf Life (Months)

24

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