Applications

LOCTITE® AA 326 – Adhesive – General Purpose Bonding

Item Name: LOCTITE® AA 326
Manufacturer: Henkel
Technologies: Acrylic (Polyurethane methacrylate)
Color: Transparent, yellow to light amber
Cure Type: Anaerobic, Secondary Cure with Activator
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

  • Technology: Acrylic
  • Chemical Type: Polyurethane methacrylate
  • Appearance: Transparent, yellow to light amber liquid
  • Components: One-component, no mixing required
  • Viscosity: High
  • Cure Type: Anaerobic, secondary cure with activator
  • Application: Bonding
  • Specific Benefits: Fast cure, high shear strength, room temperature cure

2. Applications

  • Bonding ferrites to plated materials in electric motors
  • Loudspeaker hardware assembly
  • Jewelry bonding where fast fixturing is required

3. Typical Properties

Uncured Properties

Property Value
Specific Gravity @ 23°C 1.05
Viscosity (Brookfield RVT, 25°C) 18,000 mPa.s
Viscosity (EN 12092-MV, shear rate 36 s⁻¹, 25°C) 15,000 mPa.s

Cured Properties (7 days @ 23°C)

Property Value
Elongation at break (ISO 527-3) 135%
Tensile Strength (ISO 527-2) 34 N/mm² (4,900 psi)
Tensile Modulus (ISO 527-2) 300 N/mm² (44,000 psi)
Coefficient of Thermal Expansion (ISO 11359-2) 80×10⁻⁶ K⁻¹
Thermal Conductivity (ISO 8302) 0.1 W/(m.K)
Specific Heat 0.3 kJ/(kg·K)

Electrical Properties

Property Value
Dielectric Constant (100 Hz) 5.6
Dielectric Breakdown Strength (IEC 60243-1) 30 kV/mm
Volume Resistivity (IEC 60093) 2×10¹³ Ω·cm
Surface Resistivity (IEC 60093) 2×10¹⁷ Ω

Adhesive Strength

Condition Strength
Lap Shear Strength (Steel, Activator 7649, 24h @ 23°C) 15.2 N/mm² (2,200 psi)
Tensile Strength (Steel, Activator 7649, 24h @ 23°C) 24 N/mm² (3,500 psi)
Lap Shear Strength (0.25 mm gap, Activator 7649, 24h @ 23°C) 13.8 N/mm² (2,000 psi)

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