Thermoplastic vulcanizate composition, method of producing the same, and articles made therefrom
US9309396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2010 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Dec 30, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermoplastic vulcanizate composition comprising from 5 wt % to 95 wt %, based on the total weight of the thermoplastic vulcanizate composition, of a first component comprising a first propylene-based polymer selected from the group consisting of (i) propylene/α-olefin copolymers comprising from 1 to 20 wt % α-olefin and characterized by a g′ ratio of less than 1, measured at interpolymer number average molecular weight (Mn), an MFR (2.16 kg @ 230° C.) greater than or equal to 0.01, a density greater than or equal to 0.850 g/cc, and a molecular weight distribution, Mw/Mn, less than or equal to 3.5, and (ii) combinations thereof; and from 5 wt % to 95 wt %, based on the total weight of the thermoplastic vulcanizate composition, of a second component selected from the group consisting of curable or vulcanizable rubbers, having a density from 0.85 to 0.88 g/cc, I2 from 0.001 to 5 g/10 min, and a Mooney viscosity from 5 to 400, and combinations thereof; wherein at least one of the rubbers is vulcanizable; wherein the thermoplastic vulcanizate composition has a tensile strength at break of greater than or equal to 8 MPa and tear strength at 23° C. of at least 190 lb-f/in. is provided.…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.