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Thursday, 19 September 2019
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Raw materials & technologies, Technologies

New sealants remain flexible even at high temperatures

Monday, 28 September 2015

Three new, highly flexible acrylates are especially developed for sealing and casting small-volume applications such as relays, microswitches, and pins.

Switch casting for door handles in the automotive field<emphasize>. </emphasize>Source: Delo

Switch casting for door handles in the automotive field. Source: Delo

The adhesives combine opposing properties: they are highly flexible, and yet at the same time resistant to temperatures.

Previous acrylates from Delo Industrial Adhesives fully cure within seconds, enabling fast production processes and a high yield rate. In addition, the adhesives have a universal adhesion, are highly flexible, and balance tension. Their temperature limit is 120 °C.

Considerable leap in temperature

In addition to the existing benefits, the new adhesives have taken a considerable leap in temperature, and retain their flexibility even at temperatures of up to 150°C. This can be clearly seen with a constant Young’s modulus, as even after 1,000 hours of temperature storage at 150 °C it remains low.

In addition, the acrylates have good sealing properties, as is demonstrated during a thermal shock test from -40 °C through 150 °C. The products exhibit full leak-tightness here, even after 300 cycles. These are important criteria, particularly for bondings in the automotive field.

The right sealant for each application

The new sealants are the purely light-curing "Delo-Photobond GE4009”, the light- and heat-curing "Delo-Dualbond GE4707”, and the light- and moisture-curing "Delo-Dualbond GE4906”.

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