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LOCTITE® AA 332™ (LOCTITE® 332™) – Acrylic adhesive for permanent magnet bonding in motor assembly applications

  • Item Name: LOCTITE® AA 332™ (LOCTITE® 332™)
  • Manufacturer: Henkel
  • Product Category: Adhesive
  • Technologies: Acrylic, Modified Acrylic
  • Applications: Permanent magnet bonding in motors, high impact and peel resistance bonding
  • Color: Opaque light yellow to dark amber
  • Cure Type: Activator (7387™), Secondary heat cure
  • Package Size: Contact Techniq VN for details
  • Shelf Life: Contact Techniq VN for details

1. Product Overview

LOCTITE® AA 332™ is a high-viscosity, one-component modified acrylic adhesive designed for bonding permanent magnets in motor applications. It provides strong, durable bonds with excellent impact and peel resistance. It cures using Activator 7387™ and can be accelerated with heat.

2. Applications

  • Motor magnet bonding
  • High-strength structural bonding
  • Applications requiring high impact and peel resistance

3. Typical Properties

Property Value
Uncured Properties
Chemical Type Modified acrylic
Appearance (Uncured) Opaque light yellow to dark amber
Viscosity @ 25°C (mPa·s) 75,000 – 130,000
Specific Gravity @ 25°C 0.97
Flash Point See SDS
Curing Properties
Fixture Time (Steel, Activator 7387™) ≤3 min (0.05 mm gap), ≤30 min (0.5 mm gap)
Heat Cure Conditions 130°C for 20 min, 150°C for 10 min
Cured Properties
Shore Hardness (Durometer D) 69
Tensile Modulus (N/mm²) 950 (138,000 psi)
Tensile Strength (N/mm²) 17.9 (2,600 psi)
Adhesion Strength
Lap Shear Strength (Steel, 0.05 mm gap) ≥11 N/mm² (≥1,595 psi)
Lap Shear Strength (Steel, 0.5 mm gap) ≥3.4 N/mm² (≥493 psi)
180° Peel Strength (Steel) 3.5 N/mm (20 lb/in)

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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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