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. Its 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.