Bimetallic catalyst, method of polymerization and bimodal polyolefins therefrom
    12.
    发明申请
    Bimetallic catalyst, method of polymerization and bimodal polyolefins therefrom 失效
    双金属催化剂,聚合方法和双峰聚烯烃

    公开(公告)号:US20070123414A1

    公开(公告)日:2007-05-31

    申请号:US11641254

    申请日:2006-12-19

    IPC分类号: C08F4/02 C08F4/44

    摘要: Bimetallic catalysts, and methods of producing a bimetallic catalyst comprising a modified Ziegler-Natta catalyst and a metallocene are provided, in one embodiment the method including combining: (a) a Ziegler-Natta catalyst comprising a Group 4, 5 or 6 metal halide and/or oxide, optionally including a magnesium compound, with (b) a modifier compound (“modifier”), wherein the modifier compound is a Group 13 alkyl compound, to form a modified Ziegler-Natta catalyst. Also provided is a method of olefin polymerization using the bimetallic catalyst of the invention. The modified Ziegler-Natta catalyst is preferably non-activated, that is, it is unreactive towards olefin polymerization alone. In one embodiment, the molar ratio of the Group 13 metal (of the modifier) to the Group 4, 5 or 6 metal halide and/or oxide is less than 10:1 in one embodiment. The bimetallic catalysts of the present invention are useful in producing bimodal polymers, particularly bimodal polyethylene, having a Polydispersity (Mw/Mn) of from 12 to 50. These bimodal polyolefins are useful in such articles as pipes and films.

    摘要翻译: 提供双金属催化剂和制备包含改性齐格勒 - 纳塔催化剂和茂金属的双金属催化剂的方法,在一个实施方案中,该方法包括组合:(a)包含第4,5或6族金属卤化物的齐格勒 - 纳塔催化剂和 /或氧化物,任选地包括镁化合物,与(b)改性剂化合物(“改性剂”),其中改性剂化合物是13族烷基化合物,以形成改性的齐格勒 - 纳塔催化剂。 还提供了使用本发明的双金属催化剂的烯烃聚合方法。 改性的齐格勒 - 纳塔催化剂优选是非活化的,即单独对烯烃聚合是不反应的。 在一个实施方案中,在一个实施方案中,第13族金属(改性剂)与第4,5或6族金属卤化物和/或氧化物的摩尔比小于10:1。 本发明的双金属催化剂可用于生产具有多分散性(Mw / Mn)为12至50的双峰聚合物,特别是双峰聚乙烯。这些双峰聚烯烃可用于管和薄膜等制品。

    Use of chelatable phenols with metallocene- aluminoxane catalyst systems
    18.
    发明授权
    Use of chelatable phenols with metallocene- aluminoxane catalyst systems 失效
    使用可螯合酚与茂金属 - 铝氧烷催化剂体系

    公开(公告)号:US06281320B1

    公开(公告)日:2001-08-28

    申请号:US09244442

    申请日:1999-02-04

    IPC分类号: C08F1000

    摘要: This invention comprises a metallocene catalyst system for the production of high molecular weight polyolefins, particularly polyethylene and higher poly-alpha olefins, and copolymers of ethylene and/or alpha olefins with other unsaturated monomers, including diolefins, acetylenically unsaturated monomers and cyclic olefins. The catalyst system is highly active, at low ratios of Al to transition metal, and hence catalyzes the production of a polyolefin product containing low levels of catalyst metal residues. The catalyst system comprises (i) a metallocene precursor (Component A), aluminoxane (Component B), and phenolic modifier (Component C) or (ii) the reaction product of a metallocene precursor with a phenolic compound (Component A′) and aluminoxane (Component B). There is also provide a polymerization process using the catalyst and the product so produced.

    摘要翻译: 本发明包括用于生产高分子量聚烯烃,特别是聚乙烯和更高级聚-α-烯烃的茂金属催化剂体系,以及乙烯和/或α-烯烃与其它不饱和单体(包括二烯烃,炔属不饱和单体和环烯烃)的共聚物。 催化剂体系在Al与过渡金属的低比例下是高活性的,因此催化了含有低水平催化剂金属残余物的聚烯烃产物的生产。 催化剂体系包括(i)茂金属前体(组分A),铝氧烷(组分B)和酚类改性剂(组分C)或(ii)金属茂前体与酚类化合物(组分A')和铝氧烷的反应产物 (组分B)。 还提供使用催化剂和如此制备的产物的聚合方法。