PNEUMATIC ARTICLE WITH GAS TIGHT LAYER INCLUDING A THERMOPLASTIC ELASTOMER

摘要

The invention relates to a pneumatic article (1) including an elastomer layer (10) that is inflation gas-tight, said elastomer layer (10) including at least, as a major elastomer, a styrene isobutylene/styrene (SIBS) thermoplastic elastomer. Preferably, the SIBS elastomer includes between 5 and 50 mass % of styrene, the molecular number average ranging from 30000 and 500000 g/mol and the Tg being lower than 20°C. Preferably, the sealed elastomer layer further includes as a plasticizing agent a SIBS elastomer extension oil with a ratio preferably between 3 and 100 pce. The pneumatic article (1) of the invention pefereably consists of an air tube or tyre (1) for an automobile.