Delo develops adhesives for high-temperature applications

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  • One-component epoxy resin
  • Operating temperature up to +220 °C
  • Wide range of applications, incl. bonding of magnets in electric motors

The company Delo has added new structural adhesives to its product range. These one-component epoxy resins are mainly used to bond components that are exposed to temperatures up to +220 °C.

Adhesives resistant to elevated temperatures are particularly in demand in mechanical engineering and the automotive industry, for example for electric motors. They must prove high strength, and permanent resistance to environmental influences, such as gear oil. However, the strength of adhesives is highly dependent on the temperature. Many adhesives exhibit a strong performance drop at temperatures above +150 °C. Delo’s new adhesives feature an increased shear strength of 12 MPa at such temperatures, approximating a gain of 50 percent compared to established products. Thanks to an increased glass transition temperature and an improved long-term temperature stability, up to 3 N/mm² are possible even when the bonded connection is subjected to +220 °C. The tensile strength after intensive tests, in which the adhesive is stored at a temperature of +220 °C for 1,000 h, is still above 80 percent of the initial value.

The adhesives’ mechanical properties open up versatile application possibilities in mechanical engineering. For example, Delomonopox HT282 with aluminum filler is used for bonding magnets in electric motors as it can withstand dynamic stress due to its high impact resistance. In contrast, Delomonopox HT281 with mineral filler is electrically insulating. This product bonds and casts components in electric motors, and can also be used in applications where very good chemical resistance is required, for example slide ring seals. Tried and tested processing properties enable simple and fast dispensing. In addition, the adhesives can be processed within a period of up to four weeks at room temperature.

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