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Araldite® MY 740 / Aradur® HY 906 / DY 070 – Electrical laminates, bushings, coils, filament winding, pultrusion, wet laminating, impregnation.

  • Item Name: Araldite® MY 740 / Aradur® HY 906 / DY 070

  • Manufacturer: Huntsman Advanced Materials

  • Technologies: Epoxy resin + anhydride hardener + amine accelerator

  • Color: Contact to Techniq VN for details.

  • Cure Type: Hot-curing

  • Package Size: Contact to Techniq VN for details.

  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

Araldite® MY 740 / Aradur® HY 906 / Accelerator DY 070 is a hot-curing, low-viscosity impregnating epoxy resin system designed for electrical insulation. It combines good mechanical and dielectric properties with excellent aging resistance. The system is based on:

  • Araldite® MY 740 (epoxy resin, 100 pbw)

  • Aradur® HY 906 (hardener, 95 pbw)

  • Accelerator DY 070 (1.2 pbw).

It is solvent-free, moisture-sensitive (especially HY 906), and requires controlled storage.


2. Applications

  • Manufacture of electrical laminates (tubes, rods, laminates).

  • Impregnation of high-voltage bushings and coils.

  • Processing methods:

    • Filament winding

    • Pultrusion

    • Wet laminating

    • Trickle impregnation

3. Typical Properties

a. Before Mixing

Component Property Value / Range Standard
Araldite® MY 740 Viscosity (25°C) 10,000 – 14,500 mPa·s ISO 12058
Epoxy content 5.25 – 5.55 equiv/kg ISO 3001
Density (25°C) 1.15 – 1.20 g/cm³ ISO 1675
Flash point >200 °C ISO 1523
Aradur® HY 906 Viscosity (25°C) 175 – 350 mPa·s ISO 12058
Density (25°C) 1.20 – 1.25 g/cm³ ISO 1675
Flash point >135 °C ISO 1523
Accelerator DY 070 Viscosity (25°C) <50 mPa·s ISO 2555
Density (25°C) 0.95 – 1.05 g/cm³ ISO 1675
Flash point 92 °C ISO 1523

b. After Mixing / Cured System

Property Value / Range Standard
Mechanical Properties
Tensile strength 75 – 85 MPa ISO 527
Elongation at break 3.5 – 4.5 % ISO 527
Tensile modulus 3,000 – 4,000 MPa ISO 527
Flexural strength 140 – 150 MPa ISO 178
Flexural strain 5.5 – 6.5 % ISO 178
Flexural modulus 2,500 – 3,500 MPa ISO 178
Critical stress intensity factor (KIC) 0.5 – 0.7 MPa·m½ CG 216-0/89
Specific energy at break (GIC) 70 – 100 J/m² CG 216-0/89
Glass transition temperature (Tg) 165 – 175 °C ISO 11357-2
Coefficient of linear thermal expansion 65 – 70 × 10⁻⁶/K ISO 11359-2
Thermal conductivity 0.15 – 0.20 W/m·K ~ISO 8894-1
Water absorption (10 d/23°C) 0.50 – 0.60 % ISO 62
Water absorption (60 min/100°C) 0.20 – 0.25 % ISO 62
Decomposition temperature ~350 °C DTA
Electrical Properties
Breakdown strength 22 – 26 kV/mm IEC 60243-1
HV arc resistance 70 – 80 s IEC 61621
Tracking resistance (solution A, B) CTI > 600 IEC 60112
Dielectric constant (50 Hz, 25°C) ~5.5 – 6.0 IEC 60250
Dielectric loss factor (tan δ, 50 Hz) Low (temperature-dependent) IEC 60250
Volume resistivity 10¹³ – 10¹⁵ Ω·cm IEC 60093

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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