HUNTSMAN ARALDITE CW 1446

Harmonization Code : 3909509090 | Polyurethanes potting

HUNTSMAN ARALDITE CW 1446

Main features

  • Filled, Solvent-Free Epoxy Casting and Impregnation System
  • Six-Hour Cure Cycle
  • UL 94 V-0 Classification

Product Description

ARALDITE® CW 1446 / ARADUR® HY 2919-1 Epoxy System is a filled, solvent-free two-part epoxy casting and impregnation system for electrical and electronic components. The mineral-filled resin combines with a low-viscosity anhydride hardener to support impregnation where dielectric properties and thermal-shock resistance are required. The system is documented for power diodes, rectifiers, power transistors, transformers, and capacitors. A typical resin-to-hardener ratio of 100:24 by weight and a six-hour cure at 100°C are listed for the combined system, with final properties reported for the cured material.

Key features

  • Casting and impregnation system: The filled epoxy resin and low-viscosity anhydride hardener support electrical component processing.
  • Dielectric cured property: Typical cured dielectric strength is 25 kV/mm.
  • Thermal and flame properties: Typical thermal conductivity is 0.67 W/m·K with UL 94 V-0 classification at 10 mm.

Applications / Suitable for

  • Power diodes and rectifiers
  • Power transistors
  • Transformers and capacitors
Product Family

ARALDITE CW 1446

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Grey-brown, viscous liquid / Yellow brown ro red brown clear liquid
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Resin / Hardener
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
100:24
Pot Life
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed. It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
525 minutes
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.75 – 1.83 / 1.180 – 1.220

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
Resin appearance Gray-brown filled epoxy N/A ARALDITE CW 1446 BDF
Resin viscosity 15,000 to 30,000 mPa·s As supplied
Resin density 1.75 to 1.83 g/cm³ As supplied
Hardener appearance Brown anhydride liquid N/A ARADUR HY 2919-1
Hardener viscosity 50 to 100 mPa·s As supplied
Hardener density 1.18 to 1.22 g/cm³ As supplied
Mix ratio 100:24 parts by weight Resin : hardener
Technical properties

After-processing / final-state properties

Typical final-state values under the stated conditions. These values are not sales specifications.

Property Value Unit Method / condition
Reference cure 6 h At 100°C
Hardness 92 Shore D Typical cured value
Dielectric strength 25 kV/mm Typical cured value
Thermal conductivity 0.67 W/m·K Typical cured value
Service temperature range -40 to 181 °C Documented system range
Flammability classification V-0 UL 94 At 10 mm thickness

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