Otto Bayer (4 November 1902 – 1 August 1982)[1] was a German industrial chemist at IG Farben who was head of the research group that in 1937 discovered the polyaddition for the synthesis of polyurethanes out of poly-isocyanate and polyol.

[2] Bayer was not related to the founding family of Bayer Corp. Today polyurethanes are ubiquitous throughout modern life.

Bayer was the 1975 recipient of the Charles Goodyear Medal.

[3] He was the 1974 recipient of the Carl-Dietrich-Harries-Medal for commendable scientific achievements.

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