Organic chemistry
Since the invention of the first synthetic polymer product, bakelite, synthetic polymer products have frequently been invented.
DuPont
In the 1920s, DuPont continued its emphasis on materials science, hiring Wallace Carothers to work on polymers in 1928. Carothers invented neoprene, a synthetic rubber; the first polyester superpolymer; and, in 1935, nylon. The invention of Teflon followed a few years later. DuPont introduced phenothiazine as an insecticide in 1935.