Thermoplastic elastomer based on polynorbornene and polyvinyl chloride

Abstract

This composition comprises a mixture of 20 to 70 parts by weight of polynorbornene, crosslinked or uncrosslinked, 80 to 30 parts by weight of a polymer based on vinyl chloride and of at least one plasticiser customary for polynorbornene and the polymer based on vinyl chloride in an amount sufficient for reducing the glass-transition temperature of polynorbornene down to the range of rubbers. To prepare the thermoplastic composition comprising crosslinked polynorbornene, a mixture of polynorbornene, a polymer based on vinyl chloride, a plasticiser customary for polynorbornene and the polymer based on vinyl chloride and a crosslinking system is kneaded at a temperature sufficiently high and during a period sufficiently long for crosslinking polynorbornene. Applications: Manufacture of flexible tubes, seals for the construction and automobile industries, protective bellows for the automobile industry, injection-moulded articles, such as solid wheels for the toy industry, and the like.

Dependencies are inferred from the claim text.