HUNTSMAN ARALDITE CW 1446
Harmonization Code : 3909509090 | Polyurethanes potting
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
Technical Specifications
General Properties
Additional Information
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 |
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 |
