6461. Neoprene

Nomenclature

Duprene; GR-M; polychloroprene; poly(2-chloro-1,3-butadiene).

Description and references

Mol wt range of 100,000-300,000. An oil-resistant synthetic rubber, with predominantly trans configuration made by polymerization of chloroprene. Prepn: W. H. Carothers et al., J. Am. Chem. Soc. 53, 4203 (1931). Review: P. J. Johnson in Kirk-Othmer Encyclopedia of Chemical Technology vol. 8 (Wiley-Interscience, New York, 3rd ed., 1979) pp 515-534.

Chemical structure

Properties

d20 approx 1.23. nD20 approx 1.5512. Brittle point: -35°. Softens ca. 80°. Has high tensile strength, resilience and abrasion resistance.

Use

In mechanical and automotive products; as wire and cable jackets, gaskets, roof coatings, binder for fibers.