Elastomer composition and medical container stopper formed by molding same
US11718755B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2020 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Feb 28, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The elastomer composition of the present invention comprises a thermoplastic elastomer composition which contains 20 to 80% by weight of component (A), 1 to 25% by weight of component (B), and 1 to 70% by weight of component (C): Component (A): at least one block copolymer selected from: a block copolymer having a polymer block derived from a vinyl aromatic compound and a polymer block derived from at least one selected from a conjugated diene and isobutylene; and a block copolymer obtained by hydrogenating the block copolymer; Component (B): a polypropylene resin containing component (B1): a modified polypropylene obtained by graft-modifying a polypropylene resin with a diene compound; and Component (C): a hydrocarbon softener for rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.