Supported olefin polymerization catalysts
    2.
    发明授权
    Supported olefin polymerization catalysts 失效
    负载型烯烃聚合催化剂

    公开(公告)号:US06583242B2

    公开(公告)日:2003-06-24

    申请号:US09921354

    申请日:2001-08-02

    IPC分类号: C08F406

    摘要: A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support having mean particle size less than about 30 microns chemically treated with alumoxane; (b) an organometallic complex comprising a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is &pgr;-bonded to M; and (c) an activator. Chemical treatment with alumoxane and support mean particle size less than 30 microns are key to making supported indenoindolyl containing catalysts having high activity.

    摘要翻译: 公开了一种负载型烯烃聚合催化剂体系及其制备方法。 催化剂体系包括:(a)具有用铝氧烷化学处理的平均粒度小于约30微米的载体; (b)包含第3至10族过渡金属或镧系金属M的有机金属络合物和与p结合的至少一个茚并吲哚基配体; 和(c)活化剂。 用铝氧烷进行化学处理和平均颗粒尺寸小于30微米是制备具有高活性的含支链茚基吲哚基的催化剂的关键。

    Olefin polymerization process using triisobutylaluminum as a scavenger
    7.
    发明授权
    Olefin polymerization process using triisobutylaluminum as a scavenger 有权
    使用三异丁基铝作为清除剂的烯烃聚合方法

    公开(公告)号:US06903170B2

    公开(公告)日:2005-06-07

    申请号:US10673302

    申请日:2003-09-29

    申请人: Shaotian Wang

    发明人: Shaotian Wang

    摘要: Ethylene and optional comonomers are polymerized using a supported metallocene catalyst, an alumoxane activator, and triisobutylaluminum (TIBAL). A silica support is first pretreated with a silane compound and then with an organoboron compound. The treated silica is then combined with a Group 4 metallocene complex and an alumoxane to generate a supported, activated catalyst. While it was previously thought that the particular support treatment technique used herein provided benefits only for polymerizations catalyzed by non-metallocene single-site complexes, it has now been found that similar benefits can be realized even with conventional metallocenes if TIBAL is selected as the scavenger.

    摘要翻译: 乙烯和任选的共聚单体使用负载型金属茂催化剂,铝氧烷活化剂和三异丁基铝(TIBAL)进行聚合。 首先用硅烷化合物然后用有机硼化合物预处理二氧化硅载体。 然后将经处理的二氧化硅与第4族茂金属络合物和铝氧烷组合以产生负载的活化催化剂。 尽管以前认为本文所使用的特定的支持处理技术仅为非茂金属单位点复合物催化的聚合提供了有益效果,但是现在已经发现,即使选择TIBAL作为清除剂,也可以使用常规金属茂来实现类似的益处 。

    Olefin polymerization catalysts containing modified boraaryl ligands
    9.
    发明授权
    Olefin polymerization catalysts containing modified boraaryl ligands 失效
    含有改性硼芳基配体的烯烃聚合催化剂

    公开(公告)号:US06294626B1

    公开(公告)日:2001-09-25

    申请号:US09439462

    申请日:1999-11-15

    IPC分类号: C08F452

    摘要: A single-site olefin polymerization catalyst is described. The catalyst comprises an activator and an organometallic compound that includes a Group 3 to 10 transition or lanthanide metal, M, and a modified boraaryl ligand. We surprisingly found that the catalyst is more active in olefin polymerization compared to other catalysts containing non-modified boraaryl ligands. Most surprisingly, the supported catalyst gives polyolefins with a multimodal molecular weight distribution having separate components of distinct molecular weight.

    摘要翻译: 描述了单位点烯烃聚合催化剂。 催化剂包括活化剂和有机金属化合物,其包括第3至10族过渡金属或镧系元素金属,以及修饰的硼芳基配体。 我们惊奇地发现,与含有未修饰的硼烷基配体的其它催化剂相比,催化剂在烯烃聚合中更具活性。 最令人惊奇的是,负载催化剂给出具有分子量分布不同的多峰分子量分布的聚烯烃。