Lighter, easy-to-process thermoplastics

Heat management for LED lighting with new thermally conductive polycarbonates from Covestro

LED fixture injection molded from Makrolon TC polycarbonate
The back enclosure of A.L.P. Lighting‘s Recruit™ wall mount fixture is injection molded from Makrolon® TC polycarbonate. (Photo: A.L.P. Lighting)

Pittsburgh, May 9, 2018 — Covestro offers a portfolio of thermally conductive (TC) polycarbonate materials that provides a solution for heat management in LED lamps or luminaires and other industry applications. With these materials, lighting manufacturers can replace the metal in heat sink applications, integrate more functions, optimize design by reducing the number of components and decrease manufacturing complexity by utilizing in-mold assembly of electronics.

Now, Covestro is extending its Makrolon® TC polycarbonate portfolio with the launch of several new grades. These materials feature a balance of conductivity and viscosity, which improves processing by reducing cycle times and energy consumption. Additionally, some grades can be processed by both injection molding and profile extrusion.

Makrolon® TC511 polycarbonate and Makrolon® TC611 polycarbonate have similar thermal conductivity values when compared to existing Makrolon® TC8010 polycarbonate and Makrolon® TC8030 polycarbonate, with improved flow to fill thin-wall parts. These grades are available in a black color and offer a lower density than conventional thermally conductive plastics.

Additionally, Makrolon® TC110 polycarbonate is a thermally conductive grade that is also electrically insulating and can be processed by injection molding or extrusion. This grade shows outstanding impact resistance when compared to other thermally conductive plastics and is white in color.

The Covestro family of Makrolon® TC polycarbonate is an alternative to other materials used in heat management applications. When compared to aluminum, these polycarbonate grades feature a significantly lower weight and the option to be integrated with other components … all while safely dissipating heat. Additional advantages of Makrolon® TC polycarbonate over other thermally conductive plastics include:

  • High dimensional accuracy
  • Excellent dimensional stability over a broad temperature range
  • Combinability with other polycarbonates in multi-component processing

“We’re always working to develop state-of-the-art materials that help create innovative and sustainable products and technologies for the lighting industry,” said Kevin Dunay, electrical industry manager – Polycarbonates, Covestro LLC. “The new Makrolon® TC polycarbonate grades are an example of how we can provide lighting manufacturers and designers with a material solution for heat management that offers design freedom and is lighter and easier to process.”

Attendees of LIGHTFAIR International can visit the Covestro booth (#3781) to learn more about the company’s materials and applications for LED lighting.

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, which is among the world’s largest polymer companies with 2017 sales of EUR 14.1 billion. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, construction, wood processing and furniture, electrical and electronics and medical industries. Other sectors include sports and leisure, cosmetics and the chemical industry itself. Covestro has 30 production sites worldwide and employed approximately 16,200 people at the end of 2017.

Find more information at or

Covestro Contact:

John Skabardonis, Phone: +1 412 413 5444

Makrolon® is a registered trademark of the Covestro group.

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This press release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG. 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 public reports which are available on the Covestro website at Covestro assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.

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