This article is about the history of the brand. For the material in general, see Polycarbonate.

Lexan is a registered trademark for SABIC Innovative Plastics' (formerly General Electric Plastics) brand of polycarbonate resin thermoplastic. Polycarbonate polymer is produced by reacting bisphenol A with phosgene. Lexan is the brand name for polycarbonate sheet and resin in a wide range of grades. Lexan is mainly used in three domains: building (glazing and domes), industry (machine protection and fabricated parts) and communication and signage. Common usages include space and sports helmets, clear high-performance windshields and aircraft canopies, motor vehicle headlight lenses, and bullet-resistant windows.

Development and patent

Dr. Hermann Schnell of Bayer in Germany invented the polycarbonate resin in 1953, just one week before chemist Dr. Daniel Fox of GE independently made the same discovery while working on a wire coating. They had created a gooey substance that, once hardened, could not be broken or destroyed without great effort. Both teams were impressed by the remarkable toughness of the material.

Both companies applied for U.S. patents in 1955. Before it was clear which would win the patent, both agreed that the patent holder would grant a license for an appropriate royalty.[1] This agreement allowed both companies to concentrate on developing the polymer and was particularly advantageous to GE, since GE would not otherwise have been able to sell a product during the life of the original patent.


In the 1960s, NASA used Lexan-brand polycarbonate for astronaut helmet assemblies and visors which became known as "bubble helmets", including those used by the Apollo moon astronauts. Lexan is also one brand of polycarbonate used to make football and other sports helmets[2] In 1968, Lexan brand polycarbonate sheet could be used in windows, signs, greenhouses and other large applications. By laminating sheets up to 1.25" thick in the 1970s, a material tough enough to stop bullets was created. By 1969, taillights made from Lexan brand polycarbonate were used on the Dino Ferrari. It was also used not only in industrial safety glasses, but also to make lightweight traditional eyewear.[3] Today, it is used in manual fire alarm activation stations, bus shelters, aircraft windows, machine guards, sound walls and ice hockey visors.[4]


Lexan is now manufactured by SABIC Innovative Plastics. It is manufactured at several SABIC plants, the largest being in Mt. Vernon, Indiana; Burkville, Alabama; Cartagena, Spain; and Bergen op Zoom, Netherlands. SABIC Innovative Plastics is headquartered in Pittsfield, Massachusetts. Jack Welch, former CEO of GE, started as a chemical engineer in this division in Pittsfield.


External links

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.