Ethylene-based copolymer and propylene-alpha-olefin-diene compositions for use in layered articles
US12305027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2020 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Feb 13, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2467/006
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An elastomeric composition suitable for use in belts like transmission belts may comprise: from 5 to 100 phr of a propylene-α-olefin-diene (PEDM) terpolymer comprising 80 wt % to 97.5 wt % propylene, 2.5 wt % to 20 wt % a-olefin, and 0.5 wt % to 10 wt % diene, said wt % based on the weight of the PEDM terpolymer, and wherein the PEDM terpolymer has (a) Mooney viscosity (ML(1+4)) of 1 MU to 60 MU, (b) melt flow rate of 0.5 g/min to 100 g/min, and (c) a weight average molecular weight to n-average molecular weight (Mw/Mn) ratio of 1.5 to 3.0; and from 60 to 95 phr of an ethylene-based copolymer comprising 0 wt % to 95 wt % ethylene, 0 wt % to 10 wt % of one or more dienes, and 5 wt % to 60 wt % C3 to C12 α-olefin, said wt % based on the total weight of the ethylene-based copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.