Processes for producing high propylene content PEDM having low glass transition temperatures using tetrahydroindacenyl catalyst systems

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-ethyle...

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Hauptverfasser: Shah, Rhutesh K, Eckert, Chase A, Canich, Jo Ann M, Hagadorn, John R, Barsan, Florin, Bai, Zhifeng, Mattler, Sarah J
Format: Patent
Sprache:eng
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Zusammenfassung: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.