Polymerization catalyst systems and processes therefor and therewith
    93.
    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

    IPC分类号: C08F452

    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。

    Chromium catalyst compositions and ethylene polymerization processes
therewith
    98.
    发明授权
    Chromium catalyst compositions and ethylene polymerization processes therewith 失效
    铬催化剂组合物和乙烯聚合方法

    公开(公告)号:US5599887A

    公开(公告)日:1997-02-04

    申请号:US450046

    申请日:1995-05-25

    IPC分类号: C08F4/22 C08F10/02 C08F4/24

    CPC分类号: C08F10/02

    摘要: This invention provides a chromium catalyst system that comprises[a] a support that comprises silica, wherein said support has a surface area to pore volume relationship as follows0.5.ltoreq.Pore volume.ltoreq.f(SA)wherein said f(SA) is(1.14.times.10.sup.-7)(SA).sup.3 -(1.19.times.10.sup.-4)(SA).sup.2 +(3.19.times.10.sup.-2)(SA)+0.20;and[b] a hexavalent chromium compound;wherein the surface concentration of said hexavalent chromium on said support is from 0.25 to 1 hexavalent chromium atoms per square nanometer.Another embodiment of this invention provides a process to homopolymerize ethylene, or copolymerize ethylene with a comonomer, said process comprises polymerizing ethylene with the above chromium catalyst composition.

    摘要翻译: 本发明提供了一种铬催化剂体系,其包含[a]包含二氧化硅的载体,其中所述载体具有以下孔隙体积关系的表面积:0.5孔体积f(SA)其中所述f(SA) (1.14×10-7)(SA)3-(1.19×10-4)(SA)2+(3.19×10-2)(SA)+ 0.20; 和[b]六价铬化合物; 其中所述载体上所述六价铬的表面浓度为每平方毫米0.25至1个六价铬原子。 本发明的另一个实施方案提供了使乙烯均聚或使共聚单体共聚的方法,所述方法包括使乙烯与上述铬催化剂组合物聚合。

    Olefin polymers prepared by polymerization with treated alumina
supported chromium
    99.
    发明授权
    Olefin polymers prepared by polymerization with treated alumina supported chromium 失效
    通过用处理的氧化铝负载的铬进行聚合制备的烯烃聚合物

    公开(公告)号:US5401820A

    公开(公告)日:1995-03-28

    申请号:US993488

    申请日:1992-12-18

    CPC分类号: C08F10/00

    摘要: In one embodiment of this invention a surface silicated alumina composition, as opposed to conventional silica alumina, is provided. Such composition may also be fluorided and/or phosphated or phosphited. The resulting compositions are broadly useful but are of particular applicability as supports for chromium olefin polymerization catalysts. In another aspect alumina is fluorided and used with hexavalent chromium catalyst and a co-catalyst or in the alternative with an organochromium catalyst. If desired the support in this embodiment can also be phosphated or phosphited. In another embodiment, aluminum phosphate is formed in the pores of alumina. In contrast with alumina catalyst supports of the prior art, the supports of this invention allow for the production of olefin polymers at high rates of productivity. Also novel high density ultrahigh molecular weight polymers are produced.

    摘要翻译: 在本发明的一个实施方案中,提供了与常规二氧化硅氧化铝相反的表面硅化氧化铝组合物。 这种组合物也可以被氟化和/或磷酸化或磷酸化。 所得组合物广泛可用,但作为铬烯烃聚合催化剂的载体具有特别的适用性。 另一方面,将氧化铝氟化并与六价铬催化剂和助催化剂一起使用,或者用有机铬催化剂代替。 如果需要,本实施方案中的载体也可以被磷酸化或磷酸化。 在另一个实施方案中,在氧化铝的孔中形成磷酸铝。 与现有技术的氧化铝催化剂载体相反,本发明的载体允许以高生产率生产烯烃聚合物。 还生产出新型的高密度超高分子量聚合物。

    System of chromium catalyst and yttrium catalyst, olefin polymerization
process, and polymer
    100.
    发明授权
    System of chromium catalyst and yttrium catalyst, olefin polymerization process, and polymer 失效
    铬催化剂和钇催化剂体系,烯烃聚合方法和聚合物

    公开(公告)号:US5399622A

    公开(公告)日:1995-03-21

    申请号:US153694

    申请日:1993-11-17

    摘要: A catalyst system for the polymerization of alpha-olefins comprising a chromium-containing catalyst and an yttrium-containing catalyst wherein the yttrium-containing catalyst is represented by the formula (Cp.sub.2 YX.sub.x).sub.y.M.sub.z L.sub.n, wherein Cp is cyclopentadienyl or cyclopentadienyl substituted with alkyl or alkyl silyl radical or radicals, X is a halogen, M is an alkali metal, L is a suitable electron donor ligand, x is 1 or 2, y is 1 or 2, z is 0 or 1, and n is a number corresponding to the value needed to form a stable complex, with the proviso that when y is 2, z and n are 0 is provided. Also disclosed is a polymerization process employing such a catalyst system, and novel olefin polymers. Polymers thus produced exhibit high bulk density and a broad molecular weight distribution.

    摘要翻译: 包含含铬催化剂和含钇催化剂的α-烯烃聚合催化剂体系,其中含钇催化剂由式(Cp2YXx)y.MzLn表示,其中Cp是环烷基或环烷基,被烷基或 烷基甲硅烷基或自由基,X是卤素,M是碱金属,L是合适的电子给体配体,x是1或2,y是1或2,z是0或1,n是对应于 形成稳定复合物所需的值,条件是当y为2时,z和n为0。 还公开了使用这种催化剂体系的聚合方法和新的烯烃聚合物。 如此制备的聚合物表现出高的堆积密度和宽的分子量分布。