Protection for LEDs exposed to hazardous atmospheres

Clear flame retardant resin

flame retardant resin
With popular demand, Electrolube developed the UR5641, an optically clear, flame retardant resin. Source: Electrolube

As the demand for LED encapsulation increases, the electro-chemicals manufacturer, Electrolube, has developed an optically clear, flame retardant resin.

Traditionally, in order to obtain the desired flame retardancy, resin manufacturers have used solid fillers to achieve this but such fillers simply do not permit a transparent resin when cured. Also, liquid flame retardants tend to be halogenated, whereas the UR5641 resin does not contain any fillers and has the additional benefit of being halogen free.

This resin has an aliphatic urethane chemistry base, which is naturally resistant to the yellowing effects of natural light, suitable for exterior and interior applications. It cures to provide a flexible and protective covering over the luminaire elements. The resin also offers high resistance to weather, acids and alkalis, water and mold growth. It is a two-part, semi-rigid, flame retardant polyurethane resin that meets the UL94 V-0 standard. As a durable, low viscosity system, it can be used for a variety of applications. It is suitable for the protection of LEDs exposed to hazardous atmospheres, such as emergency lighting, or for installations in ATEX rated/zoned environments.

With a high dielectric strength of 11 kV/mm and thermal conductivity of 0.35 W/m.K, it provides an operating temperature range of –40 to +120°C. The RoHS-2 compliant resin also provides a cure time within 24 hours at 23°C or 4 hours at 60°C.

SMT Hybrid Packaging, Booth 4-548

Hier finden Sie mehr über:

Current Issue

Titelbild EPP EUROPE Electronics Production and Test 11



Subscribe to our newsletter now


Find all current Whitepapers


Here you can find all current videos Infoservice

Vielen Dank für Ihre Bestellung!
Sie erhalten in Kürze eine Bestätigung per E-Mail.
Von Ihnen ausgesucht:
Weitere Informationen gewünscht?
Einfach neue Dokumente auswählen
und zuletzt Adresse eingeben.
Wie funktioniert der Infoservice?
Zur Hilfeseite »
Ihre Adresse:

Die Konradin Verlag Robert Kohlhammer GmbH erhebt, verarbeitet und nutzt die Daten, die der Nutzer bei der Registrierung zum Infoservice freiwillig zur Verfügung stellt, zum Zwecke der Erfüllung dieses Nutzungsverhältnisses. Der Nutzer erhält damit Zugang zu den Dokumenten des Infoservice.