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Araldite® DBF with Aradur® HY 956 EN – Low-viscosity epoxy casting system for encapsulating and potting low-voltage electronic components

Item Name: Araldite® DBF / Aradur® HY 956 EN
Manufacturer: Huntsman Advanced Materials
Technologies: Two-component, low-viscosity, unfilled epoxy resin with polyamine hardener
Color: Clear liquid (both resin and hardener); cured casting – Yellow
Cure Type: Room temperature curing (minimum 24–48 hours) or accelerated with 60°C
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

Araldite® DBF / Aradur® HY 956 EN is a low-viscosity, unfilled epoxy casting resin system designed for room temperature curing. It allows high filler addition, provides good heat resistance, and offers strong resistance to atmospheric and chemical degradation.


2. Applications

  • Encapsulation and potting of low-voltage and electronic components.

  • Processing methods: Casting and vacuum casting.

3. Typical Properties

a. Components (Not Mixed)

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

b. Mixed System & Processing

Property Value
Mix Ratio (by weight) 100 (Resin) : 20 (Hardener)
Mix Ratio (by volume) 100 : 22
Mix Viscosity at 25°C 1800 mPa·s
Mix Viscosity at 40°C 1300 mPa·s
Pot Life at 25°C (to 5000 mPa·s) 70 min
Pot Life at 25°C (to 15000 mPa·s) 120 min
Pot Life at 40°C (to 5000 mPa·s) 45 min
Pot Life at 40°C (to 15000 mPa·s) 62 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

c. Mechanical & Physical Properties (Cured System)

Property Value
Color of Casting Yellow
Density (g/cm³) 1.1
Glass Transition Temp (°C) 64
Flexural Strength (MPa) 107
Elongation at Break (%) 12
Flexural Modulus (MPa) 2900
Hardness (Shore D) 80
Tensile Strength (MPa) 58
Elongation at Break (%) 6.4
Tensile Modulus (MPa) 2880
Impact Strength (kJ/m²) 69
Water Absorption (23°C, 10d) 0.63%
Water Absorption (100°C, 30 min) 0.65%

d. Electrical Properties (Cured System)

Property Value
Dielectric Strength (2 mm) 24 kV/mm
Dielectric Loss Factor (50 Hz, 25°C) 0.8%
Dielectric Constant (50 Hz, 25°C) 4.1
Volume Resistivity (25°C) 7 × 10¹⁵ Ω·cm
Tracking Resistance (CTI) > 600
Electrolytic Corrosion Grade A-1

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