Electrolube UR5641 optically clear, flame-retardant resin

Electrolube’s UR5641 is an optically clear polyurethane resin that has been developed to meet the increasing demands from LED manufacturers for an optically clear, flame-retardant resin.

The two-part, semi-rigid encapsulation resin cures to provide a flexible, protective and aesthetically pleasing covering over the luminaire elements. The aliphatic chemical nature of the cured resin is naturally resistant to the yellowing effects of UV light, making it useful for a range of outdoor as well as indoor applications. The resin is also scratch resistant and offers high resistance to weather, acids and alkalis, water and mould growth.

Due to a carefully selected blend of components, a durable, low-viscosity system is achieved, which can be used for a wide variety of applications. The resin has a wide operating temperature of -40 to +120°C and thermal conductivity of 0.20 W/mK.

The resin is flame retardant and UL94 V-0 approved, making it suitable for the protection of LED luminaires exposed to hazardous atmospheres, such as emergency lighting or lighting intended for installation in ATEX rated/zoned environments.