This invention relates to production of propylene-predominant copolymers using a transition metal complex and at least two different non-coordinating anion activators. An olefinic feed comprising a C3-C40 alpha olefin, ethylene, and a diene monomer is contacted under polymerization reaction conditions with a catalyst system comprising a first non-coordinating anion activator, a second non-coordinating borate activator differing from the first non-coordinating anion activator, and a transition metal complex comprising a tetrahydro-s-indacenyl or tetrahydro-as-indacenyl group bound to a group 3-6 transition metal. A molar ratio of the first non-coordinating anion activator to the second non-coordinating anion activator is sufficient to produce a melt flow rate under the polymerization reaction conditions for the resulting copolymer of about 30 g/10 min or below as determined by ASTM D-1238 (230° C., 2.16 kg).


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    Titel :

    Multiple non-coordinating anion activators for propylene-ethylene-diene monomer polymerization reactions


    Beteiligte:
    SHAH RHUTESH K (Autor:in) / CANICH JO ANN M (Autor:in) / BLOK EDWARD J (Autor:in)

    Erscheinungsdatum :

    06.07.2021


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / B60C VEHICLE TYRES , Fahrzeugreifen / C08J Verarbeitung , WORKING-UP / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / C09J ADHESIVES , Klebstoffe



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