ARALDITE CW 177

Harmonization Code : 3909509090 | Polyurethanes potting

ARALDITE CW 177

Main features

  • Mineral-Filled Electrical Casting Epoxy
  • 22,000 to 27,000 mPa s Casting Viscosity
  • Transformer and Capacitor Encapsulation

Product Description

ARALDITE® CW 177 Epoxy Casting Resin is a modified, mineral-filled epoxy casting resin for use in compatible two-component electrical encapsulation systems. The beige, gray, or black liquid resin is formulated for flow during casting or impregnation and is documented for transformer, filter, and capacitor applications. Its filled composition provides thermal conductivity, but final cure conditions and cured properties depend on the selected hardener and system formulation. The resin has a typical viscosity of 22,000 to 27,000 mPa·s at 25°C and a specific gravity of 1.7.

Key features

  • Filled epoxy casting resin: The modified mineral-filled resin is used in compatible electrical encapsulation systems.
  • Casting and impregnation flow: Typical viscosity is 22,000 to 27,000 mPa·s at 25°C.
  • Electrical component applications: Documented applications include transformers, filters, and capacitors.

Applications / Suitable for

  • Transformer casting and impregnation
  • Electrical filters
  • Capacitor encapsulation
Product Family

ARALDITE CW 177

Catalog Product

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Component SystemComponent System
Two (CW 177 CI / HY 177 CI)
Mix RatioMix Ratio
100 : 20
Specific GravitySpecific Gravity
1.7 / 0.98
Thermal Properties
Glass Transition Temperature (Tg)Glass Transition Temperature (Tg)
40 °C
Thermal ConductivityThermal Conductivity
0.4 W/m.K
Chemical Properties
Water AbsorptionWater Absorption
0.28 %

Additional Information

Technical properties

As-supplied / before-processing properties

Typical as-supplied values unless otherwise stated. These values are not sales specifications.

Property Value Unit Method / condition
Product form Modified mineral-filled epoxy resin N/A As supplied
Appearance Beige, gray, or black liquid N/A As supplied
Viscosity 22,000 to 27,000 mPa·s ISO 2555 at 25°C
Specific gravity 1.7 N/A At 25°C
Flash point 135 °C As supplied
Handling Homogenize before use N/A Filler may settle during storage

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