Bayer Aktiengesellschaft

Guenther Lehnert

Gottfried Pampus

Manfred Zimmermann

Dieter Maertens

Polyoctenamers, in which more than 80% of the C=C-double bonds are in the cis-configuration, with a second order transition temperature of approximately -90.degree.C, a crystallisation temperature of from -30.degree. to +10.degree.C and a melting point of +10 to +40.degree.C and a process for its production, wherein cyclooctene and, optionally, up to 20% by weight, based on the monomer total, of another cyclic olefin are polymerised in an inert organic solvent at temperatures of from -50.degree. to +10.degree.C in the presence of a catalyst of

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Leverkusen, Germany

Guenther Lehnert