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A NEW SYNTHETIC RUBBER.
Page 77
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.-An entirely new material, known as Neoprene, is being shown this week by Imperial Chemical Industries, Ltd., at an exhibition (which closes to-day) at the Federation of British Industries, 21, Tothill Street, London, S.W.1.
The key to the production of Neoprene was discovered fairly recently. It is actually polymerised chloroprene. Products of the old synthetic processes, based on isoprene, had the disadvantage that they were difficult to mill, because the molecules took the form of branched chains. By introducing chlorine they are made to form long straight chains as in actual rubber.
Neoprene fias the elastic and tensile strength of the best natural rubber, to which it is incomparably superior in its resistance to oils and certain solvents. It is less affected by chemicals, less permeable to gases, and tends to harden rather than soften when heated.