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    ETHYLENE COPOLYMER FOR BIAXIAL ORIENTATION
    5.
    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

    申请人： Nova Chemicals (International) S.A.

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

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

    摘要： 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.

    ETHYLENE COPOLYMER FOR BIAXIAL ORIENTATION
    9.
    发明公开
    ETHYLENE COPOLYMER FOR BIAXIAL ORIENTATION 审中-公开

    公开(公告)号：EP4269481A2

    公开(公告)日：2023-11-01

    申请号：EP23189835.4

    申请日：2021-06-23

    申请人： Nova Chemicals (International) S.A.

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

    IPC分类号： C08J5/18

    摘要： 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.