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Henkel Adhesive Technologies

Henkel Adhesive Technologies

Structural adhesive enables reliable motor performance in challenging environment

LOCTITE® HY 4090 tackles high-temperature, high-humidity challenges, ensuring reliable motor performance. Find out how.
This is a 3D graphic of an exploded view of an electronically commutated motor (ECM) device.

Customer challenges

  • A new motor design to be used within a demanding, high temperature/high humidity environment required a capable adhesive for magnet retention on surface permanent motors.
  • Previous motor designs leveraged an adhesive for magnet bonding that, while proven and highly effective, does not deliver the heat and humidity resistance this application required.
  • Processing speed was also a consideration, and the customer wanted a high speed solution consistent with existing adhesive performance while simultaneously delivering heat and humidity resistance capability.

Customer requirements

  • The adhesive has to withstand high operating temperatures of up to 135°C and relative humidity as high as 95%.
  • High volume magnet to shaft bonding processing necessitates a structural adhesive that can be automatically dispensed and cured quickly.
  • Long term reliability of the motor is essential to ensuring dependable function, reducing warranty claims and protecting customer brand equity.
This is a 3D graphic of an exploded view showing agnet bonding application on electric motor

Henkel solution

  • Henkel’s technical team worked with the customer to evaluate the performance of various adhesives. Utilizing advanced testing and analysis technologies at a Henkel design center, results confirmed that universal structural bonding formulation LOCTITE® HY 4090 outperformed all products tested in terms of strength under high temperature and humidity. 
  • While the customer metrics were challenging, LOCTITE® HY 4090 exceeded those criteria, showing excellent strength at temperatures as high as 150°C and at 98% relative humidity. 
  • From a processing perspective, LOCTITE® HY 4090 also delivers advantages. The two part material is easily automated and provides fast fixturing times between 90 and 180 seconds.

Key results

Once material analysis and qualification were confirmed, Henkel helped the customer facilitate seamless transfer to its motor manufacturing facility. The motors are now being used in application and performing as expected.

Product used in our solution

  • New

    Special offer!

    Structural adhesives

    LOCTITE® HY 4090

    LOCTITE® HY 4090 is a fast and powerful, high viscosity, off-white-to-light-yellow universal bonder. In the world of structural bonding, it is unique, combining strength and speed to provide powerful, long-lasting bonds. It has a fixture time of 90-180 seconds and is suitable for gaps up to 5mm (0.2"). Resistant to vibration, shock and impact, it works with a wide range of substrates. For best results, use with LOCTITE® 50 ml Adhesive Mixing Nozzle, LOCTITE® 400 ml Adhesive Mixing Nozzle, LOCTITE® 96001, or LOCTITE® 983439. 

    LOCTITE HY 4090 - 50 g Twin (dual) Cartridge (IDH 1778011)

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