Processes for producing high propylene content PEDM having low glass transition temperatures using tetrahydroindacenyl catalyst systems
US10894841B2 · kind B2 · utility
3Cited by
40References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2019 |
| Grant date | Jan 19, 2021 |
| Priority date | — |
| Expiry date | Jun 21, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L23/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides methods for producing an olefin polymer by contacting a C3-C40 olefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C3-C40 olefin-ethylene-diene terpolymer typically comprising from 30 to 55 mol % ethylene, from 69.09 to 45 mol % C3 to C40 comonomer, and from 0.01 to 7 mol % diene wherein the Tg of the terpolymer is −28° C. or less. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.