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Araldite® DBF / Aradur® HY 956 EN – Epoxy Casting Resin System – Encapsulating or potting of low voltage and electronic components

  • Item Name: Araldite® DBF / Aradur® HY 956 EN
  • Manufacturer: Huntsman Advanced Materials
  • Technologies: Low-viscosity, unfilled epoxy casting resin system
  • Color: Clear liquid (both resin and hardener), Yellow (cured casting)
  • Cure Type: Room temperature curing
  • Package Size: Contact to Avantek for details.
  • Shelf Life: Contact to Avantek for details.

1. Product Overview

Araldite® DBF / Aradur® HY 956 EN is a low-viscosity, unfilled epoxy casting resin system designed for encapsulating or potting low-voltage electronic components. The system cures at room temperature and offers high filler addition possibilities, good heat resistance, and strong resistance to atmospheric and chemical degradation.

2. Applications

  • Encapsulation or potting of low-voltage electronic components
  • Suitable for casting and vacuum casting
  • High filler-loading capability
  • Excellent heat and chemical resistance

3. Typical Properties

Unmixed Components

Property Araldite® DBF Aradur® HY 956 EN
Type Liquid epoxy resin with plasticizer Low-viscosity polyamine hardener
Viscosity at 25°C (mPa·s) 1350 – 2000 370 – 470
Specific Gravity at 25°C (g/cm³) 1.15 1.03
Appearance Clear liquid Clear liquid
Epoxy Content (Eq/kg) 4.20 – 4.35 N/A

Mixed Properties

Property Value
Mixing Ratio (by weight) 100:20
Mixing Ratio (by volume) 100:22
Mixed Viscosity at 25°C (mPa·s) 1800
Mixed Viscosity at 40°C (mPa·s) 1300
Pot Life at 25°C (Time to 5000 mPa·s) 70 min
Pot Life at 25°C (Time to 15000 mPa·s) 120 min
Gel Time at 40°C 62 min
Gel Time at 60°C 15 min
Minimum Curing Cycle 24-48 h at RT or 4 h at RT + 4 h at 60°C

Mechanical & Physical Properties (Cured at RT + 6h at 60°C)

Property Value
Color of Casting Yellow
Density (g/cm³) 1.1
Glass Transition Temperature (°C) 64
Flexural Strength (MPa) 107
Elongation at Break (%) 12
Flexural Modulus (MPa) 2900
Hardness (Shore D) 80
Tensile Strength (MPa) 58
Tensile Modulus (MPa) 2880
Impact Strength (kJ/m²) 69
Water Absorption (% by wt.) 0.63 (10 days at 23°C) / 0.65 (30 min at 100°C)

Electrical Properties (Cured at RT + 6h at 60°C)

Property Value
Dielectric Strength (kV/mm) 24
Dielectric Loss Factor (50Hz, 25°C) 0.8
Dielectric Constant (50Hz, 25°C) 4.1
Volume Resistivity (Ω·cm) 7 × 10¹⁵
Tracking Resistance (CTI) >600
Electrolytic Corrosion Resistance Grade A-1

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