| Abstrakt: |
For a long time Polytetrafluoroethylene has been considered an accidental discovery made at DuPont in 1938. Less well known is the fact that Hoechst already in the early 1930s did research in the field of fluoroethylenes, already preparing both Polytetrafluoroethylene and Polychlorotrifluoroethylene and recognizing their extraordinary qualities.At DuPont, however, Polytetrafluoroethylen was discovered by chance in 1938 during experiments to produce refrigerants, without its unusual properties being perceived. Here the reasons are outlined why Hoechst for two decades was not allowed to conduct research on Polytetrafluoroethylene, and why it therefore had to concentrate on developing the Polychlorotrifluoroethylene.Consequently Polytetrafluoroethylene was not further developed at Hoechst, where it was fist synthetized, but rather at DuPont where its polymerisation had been achieved by chance. [ABSTRACT FROM AUTHOR] |
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