Abstract
ARRIVAL OF HYPALON. The newest synthetic rubber now being produced by the Elastomers Division of du Pont is Hypalon. Chemically, it is chlorosulphonated polyethylene, made by reacting polyethylene with chlorine and sulphur dioxide to produce a vulcanisable rubber with many unusual properties. Last year, readers may remember, we published an article on liquid Neoprene coatings (CORROSION TECHNOLOGY, July 1955, 213–217). This synthetic rubber bears considerable resemblance structurally to natural rubber, but Hypalon is so different in chemical composition that its development could not possibly have been foreseen by the early workers in the field of man-made fibres.

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