TeflonTeflon®, a registered trademark of the DuPont corporation. Discovered by Roy J. Plunkett (1910-1994) in 1938 and introduced as a commercial product in 1949.
There are two (or more?) types of Teflon. First TEFLON TFE = Tetrafluorethylene The unpolymerized Teflon looks like this:
F F | | C = C | | F F
F F | |R - C - C - R| | F F
Teflon is also used as the trade name for a polymer with similar properties, perfluoroalkoxy polymer resin (PFA):
F F F F | | | |R - C - C - C - C - R| | | | F F F O | F - C - F | F
Teflon is the plastic with the lowest coefficient of friction. It is also used as a non-stick coating for pans and other cookware. Teflon is very unreactive, and so is often used in containers and pipework for reactive chemicals. The melting point is 327 °C.
Teflon has been supplemented with another DuPont product, Silverstone, a three-coat fluoropolymer system that produces a more durable finish than Teflon. Silverstone was released in 1976.
DuPont's History of Teflon page