"Scotch guard" redirects here and is not to be confused with Scots Guards.
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In 1938 Roy J. Plunket, a recent hire at DuPont, discovered polytetrafluoroethylene (or Teflon)—a fluoropolymer that led to the invention of synthetic rubber.[2] 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.[3] 3M chemists, Patsy Sherman and Samuel Smith, continued work on the properties of fluorochemicals, culminating in products that could treat most fabrics with a stain resistant coating.[4] They jointly hold 13 patents regarding fluorochemical polymers and polymerization processes, though Sherman is generally recognized as the scientist who discovered Scotchgard's possibilities.
Sales began in 1956, and in 1973 the two chemists received a patent for the formula.[1][5]
C8 fluorinated urethane constituent that has later been replaced by a C4 alternative
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