Wevo, a maker of potting, bonding and sealing compounds, has earned UL RTI (Relative Temperature Index) approval for several of its flame-retardant polyurethanes, and one temperature-resistant epoxy resin has been certified to UL 94 V-0.
RTI certification refers to long-term temperature resistance. In the case of polyurethanes, this is usually a maximum of 130° C.
Among the latest products to receive UL certification is WEVOPUR 60416 FL. A 12-month testing program confirmed an RTI of 160° C. The product has a thermal conductivity of 1.6 W/mK, making it suitable for use in the stators of electric motors, as well as inductive components such as chokes and transformers.
Wevo’s WEVOPOX 36001 FL epoxy resin, in combination with the hardener WEVODUR 5001, has been certified to UL 94 V-0 for an application thickness of 2 mm.
The new polyurethane- and epoxy-based Wevo solutions are designed for use in electrical components that are operated continuously at higher temperatures and require flame retardancy. These include transformers, chokes and sensors for electrical applications, as well as power electronics components such as charging plugs, on-board chargers and EV motors.