Pneumatic article with gas tight layer including a thermoplastic elastomer
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United States of America Patent
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Oct 25, 2016
Grant Date -
Jul 15, 2010
app pub date -
May 20, 2008
filing date -
May 29, 2007
priority date (Note) -
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Abstract
Inflatable article equipped with an elastomer layer impermeable to the inflation gases, said elastomer layer comprising at least, as the predominant elastomer, a thermoplastic stirene/isobutylene/stirene (SIBS) elastomer. Preferably the SIBS elastomer comprises between 5% and 50% by weight of stirene, its number-average molecular weight is between 30 000 and 500 000 g/mol, and its Tg is below −20° C. Preferably the airtight elastomer layer also comprises, as a plasticizing agent, an extender oil for the SIBS elastomer with a content preferably between 5 and 100 phr. The inflatable article is, in particular, an inner tube or a pneumatic tire for a motor vehicle.
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