Thermoplastic vulcanizate compositions
US10927207B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Mar 18, 2019 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermoplastic vulcanizate comprises an isotactic polypropylene matrix phase in which cross-linked rubber particles are dispersed, the rubber particles comprising an ethylene-propylene-diene terpolymer (EPDM) containing at least 40 wt % of ethylene-derived units. A propylene-ethylene-diene terpolymer (PEDM) containing at least 60 wt % propylene-derived units and less than or equal to 25 wt % of ethylene-derived units and having a heat of fusion (Hf) of 2 to 10 J/g is added to compatibilize the propylene/EPDM blend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.