11/04/2015

New Sealants Remain Flexible Even at High Temperatures

DELO Industrial Adhesives has released three new, highly flexible acrylates especially for sealing and casting small-volume applications such as relays, microswitches, and pins. The adhesives combine opposing properties: they are highly flexible, and yet at the same time resistant to temperatures.
Previous acrylates from DELO won plaudits particularly for their speed. They 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.

Things are different with the new sealants. In addition to the existing benefits, they 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 excellent 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. Both dual-curing adhesives are particularly suited to applications with shadow areas.

Source: DELO Industrie Klebstoffe GmbH & Co KGaA/delo.de/