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13 条记录 (耗时 0.019 秒)

    POLYMERIZATION CATALYSTS, THEIR PRODUCTION AND USE
    6.
    发明公开
    POLYMERIZATION CATALYSTS, THEIR PRODUCTION AND USE 失效
    聚合催化剂及其生产和使用

    公开(公告)号：EP0719287A1

    公开(公告)日：1996-07-03

    申请号：EP94925205.0

    申请日：1994-08-03

    申请人： EXXON CHEMICAL PATENTS INC.

    发明人： JEJELOWO, Moses, Olukayode ,  BAMBERGER, Robert, Lee

    IPC分类号： C08F4 ,  C08F10 ,  C08F210 ,  C08L23

    CPC分类号： C08F210/16 ,  C08F4/63904 ,  C08F4/63912 ,  C08F4/63916 ,  C08F4/63922 ,  C08F10/00 ,  C08L23/0815 ,  C08L2314/06 ,  C08F210/14 ,  C08F2500/03 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/06 ,  C08F2500/26 ,  C08F210/08

    摘要： This invention is directed toward the polymerization of olefins, optionally with a comonomer in the presence of metallocene catalyst to produce a polymer product having a controlled molecular weight distribution, ranging from narrow to broad, a high molecular weight and a narrow composition distribution. The catalyst of the invention provides for linear polyethylenes and ethylene-α-olefin copolymers with substantially higher melt strength than linear polyethylenes produced with a conventional Ziegler-Natta catalyst or a typical metallocene catalyst. The invention provides a catalyst for polymerizing olefins comprising a first component comprising at least one transition metal of Group IV, V or VI and bonded to at least two cyclopentadienyl containing rings, said rings each having at least two substituents bonded to each of said rings in the same position; a second component comprising said transition metal and said cyclopentadienyl containing rings, said rings each having at least two substituents bonded to each of said rings in the same or different position than said substituents of said first component; said substituents of the said first and second components can be the same or different, with the provision that when the substituents of said first and second components are the same, said substituents of said components are bonded to said rings in different positions; and a third component comprising said transition metal bonded to said cyclopentadienyl containing rings where one of said rings is substituted identically as said first component and another of said rings is substituted identically as said second component. The invention further provides for catalyst systems comprising the catalyst component above in combination with a cocatalyst and/or activator for the catalyst. The cocatalyst or activator can be either alumoxane or an ionic activator.

    摘要翻译： 本发明涉及在金属茂催化剂存在下烯烃任选与共聚单体聚合以制备具有受控分子量分布范围从窄到宽，高分子量和窄组成分布的聚合物产物。 本发明的催化剂提供线性聚乙烯和乙烯-α-烯烃共聚物，其具有比用常规齐格勒 - 纳塔催化剂或典型金属茂催化剂生产的线性聚乙烯高得多的熔体强度。 本发明提供了用于聚合烯烃的催化剂，其包含第一组分和第二组分，所述第一组分包含至少一种第IV，V或VI族过渡金属并与至少两个含环戊二烯基的环键合，所述环各自具有至少两个与所述环中每个 同样的位置; 包含所述过渡金属和所述含环戊二烯基的环的第二组分，所述环各自具有至少两个取代基，所述取代基与所述第一组分的所述取代基在相同或不同位置与每个所述环键合; 所述第一和第二组分的所述取代基可以相同或不同，条件是当所述第一和第二组分的取代基相同时，所述组分的所述取代基在不同位置与所述环键合; 和包含结合到所述含环戊二烯基的环的所述过渡金属的第三组分，其中所述环中的一个环与所述第一组分相同地被取代，并且所述环中的另一个与所述第二组分相同地被取代。 本发明进一步提供了包含上述催化剂组分与用于该催化剂的助催化剂和/或活化剂的催化剂体系。 助催化剂或活化剂可以是铝氧烷或离子活化剂。

    POLYMERIZATION CATALYST SYSTEMS, THEIR PRODUCTION AND USE
    8.
    发明公开
    POLYMERIZATION CATALYST SYSTEMS, THEIR PRODUCTION AND USE 失效
    聚合催化剂体系，其制备方法和用途

    公开(公告)号：EP0739360A1

    公开(公告)日：1996-10-30

    申请号：EP94927237.0

    申请日：1994-08-29

    申请人： EXXON CHEMICAL PATENTS INC.

    发明人： JEJELOWO, Moses, Olukayode ,  BAMBERGER, Robert, Lee ,  SAGAR, Vispi, Ruston

    IPC分类号： C08F4 ,  C08F10 ,  C08F210

    CPC分类号： C08F10/00 ,  C08F4/63904 ,  C08F4/63908 ,  C08F4/63912 ,  C08F4/63916 ,  C08F4/6392 ,  C08F210/16 ,  C08F210/08 ,  C08F2500/12

    摘要： This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal metallocene catalyst having improved activity which when utilized in a polymerization process substantially reduces the reactor fouling and sheeting particularly in a gas phase polymerization process. In one embodiment a method is provided to produce a supported bulky ligand transition metal catalyst system by contacting a porous carrier with at least one bulky ligand transition metal compound, such as a metallocene compound, followed by the addition of a cocatalyst or activator. In another embodiment a method is provided to produce a supported catalyst system by contacting a porous carrier with an organometallic compound then adding at least one metallocene component followed by an activator. In another embodiment the activator of the invention is hydrolyzed at least once after its initial formation. In another embodiment of the invention, there is provided a process for producing polyolefins by contacting olefin monomer, optionally with comonomer in the presence of the catalyst system described above.

    POLYMERIZATION CATALYST SYSTEMS, THEIR PRODUCTION AND USE
    9.
    发明公开
    POLYMERIZATION CATALYST SYSTEMS, THEIR PRODUCTION AND USE 失效
    聚合催化剂，生产和使用

    公开(公告)号：EP0729477A1

    公开(公告)日：1996-09-04

    申请号：EP94927384.0

    申请日：1994-09-09

    申请人： EXXON CHEMICAL PATENTS INC.

    发明人： JEJELOWO, Moses, Olukayode ,  HLATKY, Gregory, George

    IPC分类号： C08F4 ,  C08F10

    CPC分类号： C08F10/00 ,  C08F4/65908 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F2420/02

    摘要： This invention is generallly directed toward a supported catalyst system useful for polymerizing olefins. The method for forming the catalyst system of the invention provides for combining a monocyclopentadienyl bulky ligand transition metal catalyst system with a separately supported organometallic compound. A preferred method provides for supporting the catalyst system on a carrier and contacting such supported system with a separately supported organometallic compound. The bulky ligand transition metal compound used in the catalyst system of the invention can be a metallocene. The ionic metallocene catalyst systems of the invention have unexpectedly high activity as compared to the catalyst systems previously described. In one embodiment of the present invention the supported catalyst is a monocylcopentadienyl transition metal metallocene compound and an ionic activator. Thus, the supported catalyst system of the present invention is broadly defined as a catalyst system which comprises a carrier, a monocyclopentadienyl bridged heteroatom transition metal containing compound, an ionic activator and a supported organometallic compound.