Pneumatic article with gas tight layer including a thermoplastic elastomer
US9475344B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 20, 2008 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Jun 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1379
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.