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untouched by scandal despite evidence of being involved
Reagan was called the 'Teflon president' by Jimmy Carter.
commercially important synthetic polymer, 1945, proprietary name registered in U.S. by du Pont, from chemical name (poly)te(tra)fl(uoroethylene) + arbitrary ending -on; popularized as a coating of non-stick pans in 1960s; metaphoric extension, especially in reference to U.S. President Ronald Reagan, is attested from an Aug. 2, 1983, speech on the floor of Congress by Pat Schroeder.
a strong, tough, waxy, nonflammable resin belonging to the family of organic polymers, substances composed of large molecules formed by chemical combination of many small ones (monomers) into chains or networks. Known by the abbreviation PTFE or the trade name Teflon, it is distinguished by its complete indifference to attack by almost all chemicals and by its slippery surface; it retains its physical properties over a wide temperature range (-270 to 250 C, or -450 to 480 F). These qualities suit polytetrafluoroethylene to uses in gaskets, bearings, linings for containers and pipes, and parts for valves and pumps that must operate in corrosive environments and for protective coatings on cooking utensils, saw blades, and other articles