Ticona, the engineering polymers business of Celanese, has introduced a new generation of Thermx polycyclohexylene-dimethylene terephthalates (PCT) to deliver reflectance stability required in light-emitting diode (LED) found in display backlight and general lighting.

According to Ticona, the two high performance super-white grades of Thermx PCT are ideal especially for high brightness, medium-power LEDs. The PCT grades also provide superior colour and reflectance stability under heat and light compared to commonly used high temperature polyamides.

Thermx LED 0201 and Thermx LED 0201S are fibre filled, super-white PCT compounds that withstand the demanding LED requirements for reflector resins with regard to heat and light stability — high initial reflectance; high reflectance stability under heat and light; excellent silicone adhesion; excellent processability; excellent mechanical properties; surface mount technology reflow capability; and low moisture absorption.

In addition to possessing the desirable chemical resistance, processability, and dimensional stability of engineering polyesters, such as polyethylene terephthalates (PET) and polybutylene terephthalates (PBT), Thermx PCT provides added heat resistance, making it particularly well suited for demanding automotive and electrical/electronics applications.