Tire object provided with an elastomer layer made of a thermoplastic elastomer in the form of an (A-b-(a-methylstyrene-co-B))n-b-C block copolymer
US10889146B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2016 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Aug 18, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A pneumatic object is provided with an elastomer layer which is gastight to inflation gases, said elastomer layer comprising, as predominant elastomer, a thermoplastic elastomer in the form of a block copolymer which comprises: (a) an elastomeric block comprising at least units derived from isobutylene, and having a glass transition temperature of less than or equal to −20° C., and (b) one or more thermoplastic blocks, the thermoplastic block(s) each comprising at least one first block consisting of units derived from at least one polymerizable monomer and at least one second block, said second block(s) being a random copolymer consisting of units derived from α-methylstyrene and of units derived from β-pinene. A process for rendering a pneumatic object gastight to inflation gases is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.