Improved stability leads to extended longevity

Specialty polycarbonates shine in LED lighting applications

Pittsburgh, February 25, 2016 — LED technology has been rapidly advancing, resulting in reduced costs and better performance that continues to spur market demand for LEDs. Industrial, commercial and residential lighting applications are increasingly turning to LED technology due to its superior energy efficiency, long life spans and excellent durability. New materials — such as polycarbonate specifically developed for LED applications — play an important role in improving LED performance and quality.

Polycarbonate materials are utilized for LED optic and lens applications, especially when heat, flame, or impact resistance is required. Conventional transparent polycarbonate can show signs of hazing and yellowing when exposed to intense LED radiation in the 400-500 nanometer (nm) range and long-term direct outdoor sunlight exposure.

To overcome this challenge, unique grades of Makrolon® LED polycarbonate from Covestro should be used to extend product longevity and minimize absorption in wavelengths between 400-500 nm. Ultraviolet (UV) yellowing during outdoor exposure is mitigated by Covestro’s AURATM UV infusion process. In this process, molded parts are immersed in a solution that penetrates into the surface of the plastic. The resulting parts exhibit reduced yellowness similar to acrylic after UV exposure.

Nicolas Sunderland, principal scientist, electrical, Polycarbonates, Covestro LLC, will discuss this in his presentation: “Polycarbonate LED Optics: Enhanced Stability for Long Term Performance” at 2:15 p.m., Thursday, March 3, during Strategies in Light 2016 in Santa Clara, California.

Strategies in Light attendees are invited to attend the presentation and stop by Covestro’s booth (#607) to learn more about the materials, technical services and technologies Covestro offers for LED lighting applications.

About Covestro LLC:

Covestro LLC is one of the leading producers of high-performance polymers in North America and is part of the global Covestro business. Covestro manufactures high-tech polymer materials and develops innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction, medical and sports and leisure industries. The Covestro group has 30 production sites around the globe and employed approximately 15,700 people at the end of September 2015.

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Covestro Contact:

John Skabardonis, Phone: +1 412-413-5444

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This news release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG or subgroup management. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Covestro’s and Bayer’s public reports which are available on the Covestro website at as well as on the Bayer website at Covestro and Bayer assume no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.

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