Process for making ethylene homopolymers
    21.
    发明申请
    Process for making ethylene homopolymers 有权
    制备乙烯均聚物的方法

    公开(公告)号:US20100129581A1

    公开(公告)日:2010-05-27

    申请号:US12313576

    申请日:2008-11-21

    Abstract: A process for making an ethylene homopolymer in the presence of an oxide-supported chromium catalyst is disclosed. A small amount of an α-olefin contacted with the catalyst before polymerizing ethylene or introduced into an ethylene homopolymerization unexpectedly boosts process productivity. When used at part per million levels, the α-olefin improves productivity while maintaining desirable polymer properties. The invention is particularly valuable for making HDPE resins useful for blow molding applications.

    Abstract translation: 公开了一种在氧化物负载的铬催化剂存在下制备乙烯均聚物的方法。 在聚合乙烯或引入乙烯均聚物之前,与催化剂接触的少量α-烯烃意外地提高了工艺生产率。 当以百万分之一的水平使用时,α-烯烃可以提高生产率,同时保持所需的聚合物性能。 本发明对于制备用于吹塑应用的HDPE树脂是特别有价值的。

    Supported olefin polymerization catalysts
    25.
    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:US06310150B1

    公开(公告)日:2001-10-30

    申请号:US09879443

    申请日:2001-06-12

    Abstract: Supported heterometallocene catalysts wherein the support is a particulate polymeric material are provided. The catalysts have a transition metal complex containing at least one anionic, polymerization stable heteroatomic ligand associated with the transition metal and a boron activator compound deposited on the support. Polymeric supports used for the heterometallocene catalysts of the invention are homopolymers of ethylene and copolymers of ethylene and C3-8 &agr;-olefins.

    Abstract translation: 提供负载型异金属茂催化剂,其中载体是颗粒聚合材料。 催化剂具有过渡金属络合物,其含有与过渡金属相关的至少一个阴离子,聚合稳定的杂原子配体和沉积在载体上的硼活化剂化合物。 用于本发明的异金属茂催化剂的聚合物载体是乙烯的均聚物和乙烯和C 3-8α-烯烃的共聚物。

    Cocatalyst for transition metal-containing .alpha.-olefin polymerization
catalyst
    26.
    发明授权
    Cocatalyst for transition metal-containing .alpha.-olefin polymerization catalyst 失效
    含过渡金属的α-烯烃聚合催化剂的助催化剂

    公开(公告)号:US5344803A

    公开(公告)日:1994-09-06

    申请号:US11046

    申请日:1993-01-29

    CPC classification number: B01J37/033 B01J23/10

    Abstract: The present invention is directed to a novel halosilane cocatalyst component which, when used in conjunction with an aluminum containing cocatalyst, is effective in increasing the activity of a supported magnesium/titanium containing catalyst in the polymerization of ethylene and .alpha.-olefins. In addition to the increased catalytic activity, the polymers produced by the present invention are characterized as having an unexpected enhancement in the polymer melt index. Thus, the catalyst system of the instant invention represents an advancement in the art in view of the combination of increased activity, i.e., yield of polymer produced, and physical properties of the polyolefin product.In another aspect of the present invention, a process for polymerizing .alpha.-olefins is disclosed. In this process at least one olefin is polymerized under olefin polymerization conditions utilizing the catalyst system of the present invention, which includes the solid catalyst component of the present invention, along with the first cocatalyst, an aluminum-containing compound, and the second cocatalyst, a halosilane compound.

    Abstract translation: 本发明涉及一种新型卤代硅烷助催化剂组分,当与含铝助催化剂结合使用时,可有效提高在乙烯和α-烯烃聚合中负载的含镁/钛的催化剂的活性。 除了增加的催化活性之外,本发明生产的聚合物的特征在于聚合物熔体指数具有意想不到的增强。 因此,鉴于增加的活性,即所生产的聚合物的产率和聚烯烃产品的物理性能的组合,本发明的催化剂体系代表了本领域的进步。 在本发明的另一方面,公开了聚合α-烯烃的方法。 在该方法中,使用本发明的催化剂体系在烯烃聚合条件下聚合至少一种烯烃,其包括本发明的固体催化剂组分以及第一助催化剂,含铝化合物和第二助催化剂, 卤代硅烷化合物。

    Cocatalyst for vanadium-containing ethylene polymerization catalyst
    27.
    发明授权
    Cocatalyst for vanadium-containing ethylene polymerization catalyst 失效
    含钒乙烯聚合催化剂的助催化剂

    公开(公告)号:US5334567A

    公开(公告)日:1994-08-02

    申请号:US10740

    申请日:1993-01-29

    Abstract: The present invention is directed to a novel halosilane cocatalyst component which may be used in conjunction with an aluminum-containing cocatalyst to provide enhanced catalytic activity of a vanadium based solid catalyst component in the polymerization of .alpha.-olefins. In addition to the enhancement in the catalytic activity obtaining using the present catalyst system, the resultant polymer produced by the present invention exhibits improved physical properties compared with polymers produced by prior art vanadium based catalyst systems. Thus, the catalyst system of the instant invention represents an advance in the art in view of the combination of increased catalytic activity, i.e. yield of polymer produced, and enhanced physical properties of the polyolefin produced.In accordance with the present invention, a catalyst system is provided which comprises a solid catalyst component and a halosilane cocatalyst component. The solid catalyst component of the present invention is the product formed by admixing a solid inorganic oxide, an organometallic compound, a vanadium-containing compound and an organic reagent.In another aspect of the present invention, a process of the polymerization of .alpha.-olefins is disclosed. In this process at least one olefin is polymerized under olefin polymerization catalyst utilizing the catalyst system of the present invention, which includes the solid catalyst component of the present invention, and a cocatalyst selected from the group consisting of halosilane compounds and admixtures thereof with aluminum compounds.

    Abstract translation: 本发明涉及一种可与含铝助催化剂结合使用的新的卤代硅烷助催化剂组分,以在α-烯烃的聚合中提供钒基固体催化剂组分的增强的催化活性。 除了使用本发明的催化剂体系提高催化活性获得之外,与现有技术的钒基催化剂体系制备的聚合物相比,本发明生产的聚合物显示出改善的物理性能。 因此,鉴于增加的催化活性(即所生产的聚合物的产率)和所生产的聚烯烃的增强的物理性质的组合,本发明的催化剂体系代表了本领域的进步。 根据本发明,提供了一种催化剂体系,其包括固体催化剂组分和卤代硅烷助催化剂组分。 本发明的固体催化剂成分是通过混合固体无机氧化物,有机金属化合物,含钒化合物和有机试剂而形成的产物。 在本发明的另一方面,公开了α-烯烃的聚合方法。 在该方法中,使用本发明的催化剂体系在烯烃聚合催化剂下聚合至少一种烯烃,其包括本发明的固体催化剂组分和选自卤代硅烷化合物及其与铝化合物的混合物的助催化剂 。

    MODIFYING POLYETHYLENE MADE BY ZIEGLER OR SINGLE-SITE CATALYST WITH FREE RADICAL INITIATOR
    28.
    发明申请
    MODIFYING POLYETHYLENE MADE BY ZIEGLER OR SINGLE-SITE CATALYST WITH FREE RADICAL INITIATOR 失效
    采用ZIEGLER或单壁催化剂制备聚乙烯与自由放射原子

    公开(公告)号:US20080171842A1

    公开(公告)日:2008-07-17

    申请号:US11652236

    申请日:2007-01-11

    CPC classification number: C08F8/06 C08F10/02

    Abstract: A method of modifying a polyethylene is disclosed. In the method ethylene or a mixture of ethylene and a C3-C10 α-olefin is polymerized in an organic solvent with a Ziegler or single-site catalyst to form an initial polyethylene solution. The initial polyethylene solution is then reacted with a free radical initiator to produce a modified polyethylene. The modified polymer has an enhanced melt elasticity and increased long chain branching index, and is essentially free of gel.

    Abstract translation: 公开了改性聚乙烯的方法。 在该方法中,乙烯或乙烯和C 3 -C 10α-烯烃的混合物在有机溶剂中与齐格勒或单中心催化剂聚合以形成初始聚乙烯溶液。 然后将初始聚乙烯溶液与自由基引发剂反应以制备改性聚乙烯。 改性聚合物具有增强的熔体弹性和增加的长链支化指数,并且基本上不含凝胶。

    Shear modification of HDPE-clay nanocomposites
    30.
    发明授权
    Shear modification of HDPE-clay nanocomposites 失效
    HDPE-粘土纳米复合材料的剪切改性

    公开(公告)号:US06884834B2

    公开(公告)日:2005-04-26

    申请号:US10247593

    申请日:2002-09-19

    CPC classification number: B82Y30/00 C08K3/346 C08K2201/011 C08L23/06

    Abstract: A method for modifying a high-density polyethylene (HDPE)-clay nanocomposite is disclosed. The method comprises shearing a melt of the nanocomposite at an effective shear rate. The modified nanocomposite shows significantly increased complex melt viscosity, storage modulus, and loss modulus.

    Abstract translation: 公开了一种改性高密度聚乙烯(HDPE) - 粘土纳米复合材料的方法。 该方法包括以有效剪切速率剪切纳米复合材料的熔体。 改性的纳米复合材料显示出显着增加的复合熔体粘度,储能模量和损耗模量。

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