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    Polymerization catalyst systems and processes therefor and therewith
    4.
    发明授权
    Polymerization catalyst systems and processes therefor and therewith 有权
    聚合催化剂体系及其工艺及其

    公开(公告)号：US06525148B1

    公开(公告)日：2003-02-25

    申请号：US09640868

    申请日：2000-08-18

    申请人： Max P. McDaniel ,  Elizabeth A. Benham ,  Al R. Wolfe ,  Paul J. DesLauriers

    发明人： Max P. McDaniel ,  Elizabeth A. Benham ,  Al R. Wolfe ,  Paul J. DesLauriers

    IPC分类号： C08F452

    CPC分类号： F16L9/127 ,  C08F10/00 ,  C08F210/16 ,  Y10T428/139 ,  C08F4/69 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/13 ,  C08F2500/04 ,  C08F4/025

    摘要： A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyaluminum, and a combination of trialkylboron and trialkylaluminum compounds. The polymerization process must be carefully controlled to produce a copolymer resin having an exceptionally broad molecular weight distribution, extremely high PENT ESCR values, and a natural branch profile that impacts branching preferably into the high molecular weight portion of the polymer. The resulting copolymer resin is especially useful in high stiffness pipe applications.

    摘要翻译： 可以使用活化的含铬催化剂体系和选自三烷基硼，三烷基硅氧烷铝和三烷基硼和三烷基铝化合物的组合的助催化剂来制备乙烯和较高级α-烯烃（优选1-己烯）的共聚物。 聚合过程必须仔细控制，以产生具有非常宽的分子量分布，极高的PENT ESCR值和天然分支分布的共聚物树脂，其优选地影响聚合物的高分子量部分的分支。 所得共聚物树脂在高刚度管道应用中特别有用。

    Methods of preparing active chromium/alumina catalysts via treatment with sulfate
    6.
    发明授权
    Methods of preparing active chromium/alumina catalysts via treatment with sulfate 有权
    通过硫酸盐处理制备活性铬/氧化铝催化剂的方法

    公开(公告)号：US07214642B2

    公开(公告)日：2007-05-08

    申请号：US10829850

    申请日：2004-04-22

    申请人： Max P. McDaniel ,  Kathy S. Collins ,  Elizabeth A. Benham ,  Paul J. DesLauriers

    发明人： Max P. McDaniel ,  Kathy S. Collins ,  Elizabeth A. Benham ,  Paul J. DesLauriers

    IPC分类号： B01J27/053 ,  B01J27/188 ,  B01J21/00 ,  C01F7/02 ,  C08F4/06

    CPC分类号： C08F10/00 ,  B01J23/26 ,  B01J27/053 ,  C08F4/63916 ,  C08F4/63925 ,  C08F110/02 ,  C08F4/69 ,  C08F2500/12 ,  C08F2500/04 ,  C08F4/025 ,  C08F4/22

    摘要： Methods of preparing a polymerization catalyst are provided that include contacting a support comprising alumina with a sulfating agent and with chromium. In an embodiment in which the chromium is provided from a chromium compound such as chromium oxide, the support may be calcined after loading the sulfating agent and the chromium on the support. Alternatively, the sulfating agent can be loaded on the support while calcining it. In another embodiment in which the chromium is provided from an organochromium compound, the support may be calcined after contacting it with the sulfating agent and before contacting it with the organochromium compound. Catalysts compositions formed by the foregoing method are provided. In an embodiment, catalyst compositions comprise chromium and a sulfate treated alumina support. The catalyst compositions have an activity for ethylene polymerization that is at least about 25% greater than an activity of the same catalyst without sulfate.

    摘要翻译： 提供制备聚合催化剂的方法包括使包含氧化铝的载体与硫酸化剂和铬接触。 在其中铬由铬化合物如氧化铬提供的实施方案中，可以在将硫酸化剂和铬负载在载体上之后煅烧载体。 或者，硫酸化剂可以在煅烧时装载到载体上。 在其中铬由有机铬化合物提供的另一个实施方案中，载体可以在与硫酸化剂接触之后并在与有机铬化合物接触之前被煅烧。 提供了通过上述方法形成的催化剂组合物。 在一个实施方案中，催化剂组合物包含铬和硫酸盐处理的氧化铝载体。 催化剂组合物具有乙烯聚合的活性，其比不含硫酸盐的相同催化剂的活性大至少约25％。

    Polymers having low levels of long chain branching and methods of making the same
    7.
    发明授权
    Polymers having low levels of long chain branching and methods of making the same 有权
    具有低水平长链支化的聚合物及其制备方法

    公开(公告)号：US07112643B2

    公开(公告)日：2006-09-26

    申请号：US10829844

    申请日：2004-04-22

    申请人： Max P. McDaniel ,  Kathy S. Collins ,  Elizabeth A. Benham ,  Paul J. DesLauriers

    发明人： Max P. McDaniel ,  Kathy S. Collins ,  Elizabeth A. Benham ,  Paul J. DesLauriers

    IPC分类号： C08F110/02 ,  C08F210/02 ,  C08F4/24

    CPC分类号： C08F10/02 ,  C08F110/02 ,  C08F4/69 ,  C08F2500/17 ,  C08F2500/04 ,  C08F2500/12 ,  C08F4/025

    摘要： Methods of producing a polymer include contacting at least one olefin with a catalyst prepared by contacting a support comprising alumina with a sulfating agent and with chromium. Polymer compositions produced in this manner may exhibit relatively low levels of long chain branching and relatively high molecular weights. In an embodiment, polymer compositions with a PDI in a range of from about 6 to about 15 have MW values greater than about 300,000 g/mol and Eo values less than about 1×106 Pa·s. The polymer compositions may further have Theological breadths greater than about 0.25 and relaxation times less than about 10 seconds.

    摘要翻译： 制备聚合物的方法包括使至少一种烯烃与通过使包含氧化铝的载体与硫酸化剂和铬接触而制备的催化剂接触。 以这种方式制备的聚合物组合物可以表现出较低水平的长链支化和相对较高的分子量。 在一个实施方案中，PDI在约6至约15范围内的聚合物组合物的M值大于约300,000g / mol且小于等于 约1×10 6 Pa。 聚合物组合物还可以具有大于约0.25的神学宽度和小于约10秒的弛豫时间。