知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

2694 条记录 (耗时 0.033 秒)

    Method of making metal-ligand complexes
    2.
    发明授权
    Method of making metal-ligand complexes 有权

    公开(公告)号：US12129326B2

    公开(公告)日：2024-10-29

    申请号：US17600409

    申请日：2020-04-27

    申请人： Dow Global Technologies LLC

    发明人： Roger L. Kuhlman ,  Pamela D. Nagel

    IPC分类号： C08F4/76 ,  C07F17/00 ,  C08F4/6592

    CPC分类号： C08F4/65925 ,  C07F17/00 ,  C08F4/76

    摘要： Embodiments of the present disclosure are directed towards method of making a metal-ligand complex, the method including: reacting a (L1)H compound and a base in a primary solvent to make a reaction mixture comprising an intermediate anionic L1 compound in the primary solvent; and reacting the intermediate anionic L1 compound and a L2MX3 complex to make a L1L2MX2 complex, wherein L1 and L2 independently are cyclopentadienyl-type (Cp-type) ligands, M is zirconium or hafnium, and each X is a halide and wherein the intermediate anionic L1 compound is not isolated from the reaction mixture.

    BRANCHED PROPYLENE-BASED POLYMER
    3.
    发明公开
    BRANCHED PROPYLENE-BASED POLYMER 审中-公开

    公开(公告)号：US20240352164A1

    公开(公告)日：2024-10-24

    申请号：US18683603

    申请日：2022-08-08

    申请人： JAPAN POLYPROPYLENE CORPORATION

    发明人： Masaaki ITO ,  Jun SHINOZAKI ,  Miori TAKIZAWA ,  Masato NAKANO

    IPC分类号： C08F210/06 ,  C08F4/6592

    CPC分类号： C08F210/06 ,  C08F4/65927 ,  C08F2420/09

    摘要： To provide a branched propylene-based polymer that is excellent in ductility when melting, while retaining melt tension necessary for molding. A branched propylene-based polymer having the following properties (1), (2) and (3): property (1): a multi-branching index (MBI) is 0.45 or more and 1.00 or less; property (2): a strain hardening index at a strain rate (dε/dt) of 1.0/see (SHI@1s−1) is 0.70 or more and 3.00 or less; and property (3): a maximum drawing rate (MaxDraw) at 230° C. and a melt flow rate (MFR) satisfy a relation represented by the following formula (1-1):











    (
    MaxDraw
    )

    >


    112
    ×

    log
    ⁡
    (
    MFR
    )


    +
    30





    Formula
    ⁢


    (

    1
    ⁢
    ‐
    ⁢
    1

    )

    PROCESS FOR PRODUCING POLYETHYLENE POLYMERS
    7.
    发明公开
    PROCESS FOR PRODUCING POLYETHYLENE POLYMERS 审中-公开

    公开(公告)号：US20240294682A1

    公开(公告)日：2024-09-05

    申请号：US18573575

    申请日：2022-06-23

    申请人： BOREALIS AG

    发明人： Pascal CASTRO ,  Vasileios KANELLOPOULOS ,  Georgy KIPIANI ,  Marja MUSTONEN ,  Irfan SAEED

    IPC分类号： C08F210/16 ,  C08F2/00 ,  C08F2/34 ,  C08F4/659 ,  C08F4/6592

    CPC分类号： C08F210/16 ,  C08F2/001 ,  C08F2/34 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65927 ,  C08F2420/07

    摘要： The disclosure relates to a process for polymerising olefins, the process comprising polymerising ethylene, optionally in the presence of at least one other alpha olefin comonomer, preferably C4-C10 alpha olefin comonomer, preferably in multi stage polymerisation process configuration, in the presence of a single-site polymerisation catalyst to produce a polymer component to produce a polyethylene polymer or a polyethylene copolymer, wherein the single-site polymerisation catalyst comprises (i) a transition metal complex; (ii) a cocatalyst; and optionally (iii) a support; and is characterised by a (Weibull modulus)×(scale parameter) product equal to or higher than 40 MPa and a (Weibull modulus)/(scale parameter) ratio equal to or lower than 0.50 MPa−1 wherein the Weibull modulus and the scale parameter are determined by the Weibull analysis of the compressive strength of the catalyst particles. The disclosure further relates to a single-site polymerisation catalyst, comprising (i) a transition metal complex; (ii) a cocatalyst; and optionally (iii) a support, preferably a silica support; wherein the single-site polymerisation catalyst is characterised by a (Weibull modulus)×(scale parameter) product equal to or higher than 40 MPa and a (Weibull modulus)/(scale parameter) ratio equal to or lower than 0.50 MPa−1 wherein the Weibull modulus and the scale parameter are determined by the Weibull analysis of the compressive strength of the catalyst particles. The disclosure further relates to use of the single-site polymerisation catalyst in the preparation of a polyethylene polymer component, a polyethylene polymer, or a polyethylene copolymer.

    IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION
    8.
    发明公开
    IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION 审中-公开

    公开(公告)号：US20240294681A1

    公开(公告)日：2024-09-05

    申请号：US18572405

    申请日：2022-06-23

    申请人： BOREALIS AG

    发明人： Vasileios KANELLOPOULOS ,  Joana Elvira KETTNER ,  Matthias HOFF ,  Apostolos KRALLIS ,  Victor SUMERIN ,  Jani AHO ,  Kalle KALLIO ,  Irfan SAEED ,  Erno ELOVAINIO

    IPC分类号： C08F210/16 ,  C08F2/00 ,  C08F2/01 ,  C08F2/34 ,  C08F2/38 ,  C08F4/6592

    CPC分类号： C08F210/16 ,  C08F2/001 ,  C08F2/01 ,  C08F2/34 ,  C08F2/38 ,  C08F4/6592

    摘要： The disclosure relates to a process for polymerising olefins in multi stage polymerisation process configuration, the process comprising a) polymerising in a first polymerisation step first olefin monomer, optionally in the presence of at least one other alpha olefin comonomer, in the presence of a metallocene polymerisation catalyst so as to form a first polymer component (A); and b) transferring the first polymer component (A) into a separation unit to remove low molecule penetrants and to obtain separated solid polyolefin particles of the first polymer component (A*) and c) polymerising in in gas phase in a second polymerisation step second olefin monomer, optionally in the presence of at least one other alpha olefin comonomer in the presence of the separated solid polyolefin particles (A*) of step b), so as to form a second polymer component (B). The disclosure further relates to a method for improving performance of a metallocene polymerisation catalyst in a multi-stage olefin polymerisation, wherein a first polymer component (A) produced in a first polymerisation step is transferred into a separation unit to remove low molecule penetrants and to obtain separated solid polyolefin particles of the first polymer component (A*) prior to transferring the obtained separated solid polyolefin particles of the first polymer component (A*) to a further polymerisation step.