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ARALDITE® CW 229 / ARADUR® HW 229 – Epoxy casting resin – Motors, generators, electrical insulation components

Item Name: ARALDITE® CW 229 / ARADUR® HW 229
Manufacturer: Huntsman
Technologies: Epoxy & Epoxy Derivatives, Composite Materials
Color: Contact to Techniq VN for details.
Cure Type: Casting Resin, medium reactivity
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

ARALDITE® CW 229 / ARADUR® HW 229 is a two-component casting epoxy resin designed for electrical insulation applications. It offers high mechanical strength, strong adhesion to metals and substrates, excellent dielectric properties, and low viscosity for homogeneous impregnation. The system delivers very high thermal resistance and is able to withstand extreme thermal cycling. Its low coefficient of thermal expansion and excellent crack resistance make it suitable for high-performance motors, generators, transformers, and other electrical components requiring efficient thermal management.


2. Applications

  • Electrical insulation for motors and generators

  • Bushings, insulators, and instrument transformers

  • Electrical switchgear and transformers

  • Vacuum casting and Automatic Pressure Gelation (APG) processing

  • Power transmission, electrical protection, and renewable energy components

3. Typical Properties

Before Mixing / Unmixed Components

Property Value Notes
Product type Casting resin Epoxy-based
Mix ratio (by weight) 1 : 1 Resin : Hardener
Viscosity 10 mPa·s at 40°C
Thermal expansion Low Prefilled with wollastonite
Reactivity Medium Controlled for casting

After Mixing / Cured System

Property Value Test Method / Notes
Glass transition temperature (Tg) 115°C
Crack resistance Excellent Wollastonite-reinforced
Dielectric strength High Suitable for insulation components
Thermal stability Up to 200°C UL 746 B recognized
Mechanical performance High Strong adhesion to metals and composites

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