Invention Reference Number
This invention presents a highly durable, heat-resistant adhesive designed for demanding environments including HVAC&R heat exchangers. It addresses the need for an adhesive that has low viscosity (to remain pourable or castable) prior to curing, yet once cured has exceptional stability, strength, and leak resistance under elevated temperatures (up to 90 °C) and pressures. The material demonstrates strong bonding performance on metal surfaces and offers improved reliability where traditional commercial adhesives may degrade.
Description
This technology features a low-viscosity, high-temperature-stable adhesive formulated for applications that require long-term durability under thermal and mechanical stress. The design incorporates commercially available resin systems and curing agents. This approach produces an adhesive that remains easy to apply prior to curing and achieves robust structural integrity once set.
Two formulations were demonstrated using distinct resin–curing agent combinations, each yielding high lap-shear strength on metal substrates at elevated temperatures. The adhesive exhibited adhesive failure behavior, indicating strong internal strength relative to its bonding interface. A tunable filler component allows adjustment of thermal expansion characteristics, supporting performance in systems exposed to repeated heating and cooling cycles.
Overall, the adhesive provides a versatile, resilient bonding solution suitable for high-temperature components where long-term leak resistance and structural reliability are essential.
Benefits
- High strength and stability at elevated temperatures (90 °C)
- Castable, low-viscosity application before curing (below 1500 cP)
- Durable bonding with strong lap shear strength (> 15 MPa)
- Customizable thermal expansion characteristics
Applications and Industries
- Heat exchangers and thermal management systems
- Electronics, energy systems, and structural assemblies
- High-temperature industrial equipment
- Transportation and aerospace components
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
