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LOCTITE® AA 3342™ – Light cure acrylic adhesive for bonding plastics, metals, glass, and medical devices

  • Item Name: LOCTITE® AA 3342™
  • Manufacturer: Henkel
  • Product Category: Adhesive
  • Technologies: Modified Acrylic, One-component
  • Applications: Structural bonding of small rigid parts, bonding ferrites into motor cans, high impact and heat-resistant bonding.
  • Color: Dark yellow/brown (uncured)
  • Cure Type: Activator-cured, secondary heat cure
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: Contact Techniq VN for details.

1. Product Overview LOCTITE® AA 3342™ is a one-component modified acrylic adhesive designed for fast fixture speed on activated surfaces. It offers high tensile strength while maintaining impact and high-temperature resistance. The adhesive is particularly suited for bonding ferrites into motor cans and structural bonding of small rigid parts of dissimilar materials.

2. Applications

  • Bonding permanent magnets
  • Structural bonding of small rigid parts
  • Applications requiring high impact and heat resistance
  • Suitable for automated assembly lines with short cycle times

3. Typical Properties

Property Value
Uncured Properties
Appearance Dark yellow/brown liquid
Specific Gravity @ 25°C 1.085
Viscosity (Brookfield – HBT, 25°C) 80,000 to 230,000 mPa·s (spindle TB, 2.5 rpm)
Viscosity (Brookfield – HBT, 25°C) 50,000 to 130,000 mPa·s (spindle TB, 20 rpm)
Cure Method Activator or heat
Property Value
Curing Performance
Fixture Time on Grit-Blasted Mild Steel (Activator 7380™ on one side) ≤200 sec
Fixture Time on Steel (0.05 mm gap) ≤3.5 min
Fixture Time on Steel (0.5 mm gap) 10-15 min
Heat Cure Conditions 120°C for 30 min
Property Value
Cured Properties (30 min @ 120°C, 0.5 mm film, Activator 7380™ on both sides)
Glass Transition Temperature (Tg) 80°C
Thermal Expansion Coefficient 70×10⁻⁶ K⁻¹
Thermal Conductivity 0.3 W/(m·K)
Shore Hardness (Durometer D) 71
Tensile Strength (ISO 527-3) 9.9 N/mm² (1,435 psi)
Tensile Modulus (ISO 527-3) 478 N/mm² (69,000 psi)
Elongation at Break 2.8%
Property Value
Electrical Properties (Cured for 24 hours @ 22°C)
Volume Resistivity (IEC 60093) 18×10¹⁴ Ω·cm
Surface Resistivity (IEC 60093) 62×10¹⁵ Ω
Dielectric Constant (1 kHz) 2.44
Dielectric Constant (10 MHz) 2.46
Property Value
Mechanical Performance
Lap Shear Strength (GBMS, Activator 7380™, 0 mm gap) ≥12 N/mm² (≥1,740 psi)
Lap Shear Strength (GBMS, Activator 7380™, 0.5 mm gap) ≥10 N/mm² (≥1,450 psi)
Lap Shear Strength (Steel, 72h @ 22°C) 15-29 N/mm² (2,180-4,200 psi)
Lap Shear Strength (Zinc Dichromate, 72h @ 22°C) 10-18 N/mm² (1,450-2,610 psi)
Compressive Shear Strength (Steel Pins/Collars) 5.5-10 N/mm² (800-1,450 psi)
Tensile Strength (Steel Pin) 4-12 N/mm² (580-1,740 psi)
“T” Peel Strength (Aluminum, Grit Blasted) 0.7-2.5 N/mm (4-14 lb/in)
Property Value
Environmental Resistance
Hot Strength (100°C) Retains ~75% of initial strength
Heat Aging (100°C, 150°C, 180°C) Maintains structural integrity over 1000h
Chemical Resistance (1000h, Various Conditions) Retains 85-95% of initial strength

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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