Applications

Resin XD 4447 / Hardener XD 4448 – Structural Adhesive – Bonding metals, ceramics, glass, PTFE, and other heat-resistant materials

  • Item Name: Resin XD 4447 / Hardener XD 4448
  • Manufacturer: Huntsman Advanced Materials
  • Technologies: Two-component epoxy adhesive
  • Color: Pale yellow (Resin XD 4447), Clear (Hardener XD 4448)
  • Cure Type: Heat curing (120-200°C)
  • Package Size: Contact to Avantek for details.
  • Shelf Life: 18 months (Resin XD 4447), 12 months (Hardener XD 4448)

1. Product Overview

Resin XD 4447 / Hardener XD 4448 is a two-component epoxy adhesive designed for structural bonding applications. It features excellent impregnating properties, high-temperature resistance up to 110°C, and a long pot life (4-6 weeks storage after mixing). The adhesive cures at 120 – 200°C and contains solvents to improve processability.

2. Applications

  • Bonding of metals, ceramics, glass, PTFE, and other heat-resistant materials
  • Electrical industry applications, including:
    • Bonding sheet steel laminations
    • Wound cores
    • Binding of iron dust cores
  • Pre-impregnated carriers (paper or glass cloth) for controlled bond-line thickness
  • Resistant to heat, chemical attack, and offers excellent electrical insulation

3. Typical Properties

Uncured (Not Mixed) Properties

Property Resin XD 4447 Hardener XD 4448 Mixed Adhesive
Color Pale yellow Clear Pale yellow
Specific Gravity 1.00 – 1.10 0.95 1.03 – 1.06
Viscosity (Pa·s) 1.2 – 3.0 ≈ 0.02 0.3 – 0.6
Solids Content (%) 58 – 63 21 – 23 ≈ 50
Flash Point (°C) 36 23
Usable Life at 18-25°C 4 weeks

Curing Conditions & Lap Shear Strength

Curing Temperature (°C) Cure Time Lap Shear Strength at 23°C (N/mm²)
120 24h 15 – 27
140 5h 17 – 19
160 2h 17 – 19
180 1h 15 – 17
200 30 min 14 – 16

Lap Shear Strength vs. Temperature (Cure: 2h at 180°C)

Temperature (°C) -40 -20 23 60 100 120 140
Lap Shear Strength (N/mm²) 17 17 17 14 10 6 3

Lap Shear Strength vs. Immersion in Various Media (After 90 Days at 23°C, Cure: 2h at 180°C)

  • Water at 20°C: Slight reduction
  • Water at 90°C: Moderate reduction
  • Acetone & Methanol: Significant reduction
  • Lubricating Oil: Minimal impact

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