Resealable thermoplastic elastomer articles
US9115282B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2014 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Sep 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermoplastic elastomer (TPE) composition is provided which contains a blend of a hydrogenated styrenic block copolymer (SBC) having a number average molecular weight (Mn) greater than about 200,000 Daltons (Da), a polypropylene, a mineral oil, and at least one filler. The composition has a hardness less than about 80 Shore A and is resealable. An article produced from such a TPE composition reseals itself so as to exhibit no leakage after puncture. A method for preventing leakage in an elastomeric article involves providing an elastomeric article formed from the TPE composition, puncturing the elastomeric article by inserting a sharp object, and removing the sharp object; the article reseals itself such that no leakage occurs from the punctured article after removal of the sharp object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.