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E. I. du Pont de Nemours and Company, commonly referred to as DuPont, is an American chemical company that was founded in July 1802 as a gunpowder mill by Eleuthere Irenee du Pont. DuPont was the world’s third largest chemical company based on market capitalization and ninth based on revenue in 2009. Its stock price is a component of the Dow Jones Industrial Average.
In the 20th century, DuPont developed many polymers such as Vespel, neoprene, nylon, Corian, Teflon, Mylar, Kevlar, Zemdrain, M5 fiber, Nomex, Tyvek, Sorona and Lycra. DuPont developed Freon for the refrigerant industry, and later more environmentally friendly refrigerants. It developed synthetic pigments and paints including ChromaFlair.
DuPont’s trademarked brands often become genericized. For instance, “neoprene” was originally intended to be a trademark, but quickly came into common usage.