Ethylene-propylene copolymers with amorphous and semi-crystalline components
US10513601B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Dec 24, 2019 |
| Priority date | — |
| Expiry date | Dec 20, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a polyolefin composition with (a) 80 to 90 wt % of an amorphous ethylene-propylene copolymer having either no crystallinity or crystallinity derived from ethylene, having about 30 wt % or more units derived from ethylene; (b) 5 to 15 wt % of a semi-crystalline ethylene-propylene copolymer having substantial crystallinity derived from ethylene and having 70 wt % or more units derived from ethylene; and (c) 1 to 5 wt % of a propylene-based elastomer having within the range from 5 to 25 wt % ethylene derived units and having a melting point temperature of less than 110° C. and a Mw/Mn within the range from 2.0 to 4.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.