Rubber, Poly 2,3-dimethylbutadiene

Methyl rubber Poly(2,3-dimethylbutadiene) Bayer, Germany (World War I)... 

Chemists at Leverkusen were familiar with cellulose ester plastics and poly 2,3-dimethylbutadiene rubber, but these were produced on a small scale without the benefit of a knowledge of macromolecular chemistry. The production of Buna S, which was a copolymer of butadiene and styrene, which was aa laboratory curiosity. In spite of opposition from influential members of Ae board of directors of I.G. Farben-industrie, Bayer directed the development of a process for the production of styrene monomer and polystyrene at the Ludwigshafen and Bitterfield plants. 

Poly(ester) resin, rigid (ca. 50% styrene) Poly((A -2-methoxyethyl)methacrylamide) Poly(2,3-dimethylbutadiene) (methyl rubber)... 

---