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    ETHYLENE COPOLYMER FOR BIAXIAL ORIENTATION
    4.
    发明公开
    ETHYLENE COPOLYMER FOR BIAXIAL ORIENTATION 审中-公开

    公开(公告)号：EP4269481A3

    公开(公告)日：2024-01-03

    申请号：EP23189835.4

    申请日：2021-06-23

    Applicant: Nova Chemicals (International) S.A.

    Inventor： FEREYDOON, Maryam ,  GOYAL, Shivendra ,  BROWN, Stephen ,  LIGHTBODY, Owen ,  AUBEE, Norman ,  GILLON, Bronwyn ,  GREEN, Thomas ,  MARK, Lison ,  CARELLO, Christian

    IPC: B29C55/14 ,  B29D7/01 ,  B29C55/00 ,  B29K23/00

    Abstract: A solution phase polymerization process to make an ethylene copolymer in a multi-zone reactor system is described. The multi-zone-reactor system comprises a first, second and third polymerization zone, wherein the first polymerization zone is defined by a first tubular reactor having an inlet and an outlet. The polymerization process comprises feeding solvent, hydrogen, a Ziegler-Natta polymerization catalyst, ethylene, and at least one alpha olefin having 4 to 8 carbon atoms, to the inlet of the first tubular reactor to initiate a polymerization reaction; feeding hydrogen to at least one location in the first tubular reactor which is downstream from the inlet of the first tubular reactor; wherein at least 80 weight percent of the total amount of hydrogen added to the multi-zone reactor system, is added to the at least one location in the first tubular reactor which is downstream from the inlet of the first tubular reactor; and wherein from 20 to 50 weight percent of the total amount of ethylene copolymer made in the multi-zone reactor system is made in the first tubular reactor. An ethylene copolymer made by the process is useful in the preparation of biaxially oriented polyethylene (BOPE) films.

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