Magnetics Business & Technology - July/August 2021 - 22

PRODUCT NEWS
New Structural Adhesive from DELO Offers
Temperature Stability
DELO MONOPOX HT2999 can be used up to 220°C.
Electrical insulation is another important property of the adhesive.
It minimizes eddy currents in electric motors, reducing heat
development and increasing motor performance. Integrated
spacers are provided with DELO MONOPOX HT2999. These
spacers ensure a very thin and uniform bonding gap of 50 µm for
magnet stacking. This allows the use of more magnetic material
and also contributes to motor efficiency.
Curing
The one-component epoxy resin is gray and pasty. It takes just
10 minutes to cure in an air convection oven at 150°C. Compared
to other high-temperature adhesives that require 30 to 40
minutes curing time at 150°C, this adhesive offers clear advantages
in saving time and energy.
E-motor with adhesive colored magenta
DELO, a manufacturer of industrial adhesives for automotive,
consumer and industrial electronics applications, has launched
an adhesive with exceptionally high temperature stability. DELO
Monopox HT2999 achieves compression shear strength of 20
MPa at 180°C. This is four times greater than its predecessor.
Technical Specifications
* Compression shear strength on magnetic material
(NdFeB) at +180°C: 20 MPa
* Glass transition temperature: +180°C
* Electrically insulating
* Layer thickness: ~ 50 µm
* Curing: 10 min at +150°C
Developed primarily for use in the automotive industry and mechanical
engineering, these high-temperature-resistant adhesives
are in demand for use with electric motors and power electronics.
Many products that are currently on the market show a
clear drop in performance at temperatures above 150°C. DELO's
new structural adhesive can be used above that temperature.
Important adhesive properties
This high-temperature resistant adhesive has been optimized
for bonding magnets in electric motors. The compression shear
strength of bonded magnets (NdFeB) is 20 MPa at 180°C. The
bonded joints remain thermally stable over time. Even after
10,000 hours of storage at 180°C, the bonded magnets achieve
a temperature stability of 20 MPa.
The maximum operating temperature of electric motors is generally
180°C. This is because the powerful, rare earth magnets
used in the motors will demagnetize at higher temperatures. If a
certain application requires resistance at higher temperatures,
22 Magnetics Business & Technology * July/August 2021
Axalta's energy solutions business includes award-winning Voltatex
impregnating resin
Adding to its line of coatings for the manufacture of electric
motors and industrial products, Axalta plans to acquire Chinese
producer of wire enamels Anhui Shengran Insulation Materials.
The company and its product line will become part of Axalta's
Energy Solutions business which has three product segments
- wire enamels, impregnating resins and electrical steel coatings
- serving the markets for new energy vehicles and industrial
applications, including its Voltatex 4224 impregnating resin
depicted above.
www.MagneticsMag.com
" Four times the strength of the previous generation is a truly
extraordinary step in development. And since the product is
also electrically insulating, it provides additional functionalities
for manufacturers of electric motors, " says Dr. Karl Bitzer, Head
of Product Management at DELO. " It's a good example of how
we're pushing the boundaries of what's technically possible, step
by step. "
For more information on this new development and the innovations
based on it, which combine high temperature stability with
light fixation or thermal conductivity, visit https://www.delo-adhesives.com/en/academy/webinars/.
Axalta
to Add to Its Coatings for Electrical
Manufacturing with Acquisition in China

https://www.delo-adhesives. com/en/academy/webinars/ https://www.delo-adhesives. com/en/academy/webinars/ http://www.MagneticsMag.com

Magnetics Business & Technology - July/August 2021

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