solvent.

History

In 1938 Roy J. Plunket, a recent hire at DuPont, discovered polytetrafluoroethylene (or Teflon)--a fluoropolymer that led to the invention of synthetic rubber. His early discovery led 3M scientists to develop the formula for Scotchgard, discovered by accident in 1953 when Joan Mullan--a 3M lab technician--spilled a few drops of a fluorochemical liquid destined for rubber jet fuel hoses onto her tennis shoes. Despite common cleaning methods, the coating resisted removal. 3M chemists, Patsy Sherman

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