Multi-stage process for the polymerization of olefins
    2.
    发明授权
    Multi-stage process for the polymerization of olefins 失效
    用于烯烃聚合的多阶段方法

    公开(公告)号:US06479609B1

    公开(公告)日:2002-11-12

    申请号:US09883514

    申请日:2001-06-18

    IPC分类号: C08F11002

    摘要: A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and (C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B). Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl/g, Mw/Mn>8 and cold xylene solubility

    摘要翻译: 公开了一种用于制备具有宽分子量分布的乙烯(共))聚合物的多阶段方法,所述方法包括:(A)在Ti或V催化剂存在下制备第一乙烯聚合物的第一聚合阶段 ;(B)在第一阶段中使用的催化剂失活并且桥接的双-2-茚基二茂锆负载在阶段(A)中制备的乙烯聚合物上,任选地在合适的助催化剂存在下的处理阶段 ; 和(C)第二聚合阶段,其中乙烯在从阶段(B)获得的产物存在下聚合。此外,公开了通过上述方法获得的聚乙烯,其特性粘度范围为0.5至6dl / g,Mw / Mn> 8,冷二甲苯溶解度<1.2%

    Multi-stage process for the polymerization of olefins
    3.
    发明授权
    Multi-stage process for the polymerization of olefins 失效
    用于烯烃聚合的多阶段方法

    公开(公告)号:US06262195B1

    公开(公告)日:2001-07-17

    申请号:US09265036

    申请日:1999-03-09

    IPC分类号: C08F442

    摘要: A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and (C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B). Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl/g, Mw/Mn>8 and cold xylene solubility

    摘要翻译: 公开了一种用于制备具有宽分子量分布的乙烯(共))聚合物的多阶段方法,所述方法包括:(A)在Ti或V催化剂存在下制备第一乙烯聚合物的第一聚合阶段 ;(B)在第一阶段中使用的催化剂失活并且桥接的双-2-茚基二茂锆负载在阶段(A)中制备的乙烯聚合物上,任选地在合适的助催化剂存在下的处理阶段 ; 和(C)第二聚合阶段,其中乙烯在从阶段(B)获得的产物存在下聚合。此外,公开了通过上述方法获得的聚乙烯,其特性粘度范围为0.5至6dl / g,Mw / Mn> 8,冷二甲苯溶解度<1.2%

    Process for preparing crystalline ethylene (co)polymers
    6.
    发明授权
    Process for preparing crystalline ethylene (co)polymers 有权
    制备结晶乙烯(共)聚合物的方法

    公开(公告)号:US07834117B2

    公开(公告)日:2010-11-16

    申请号:US11887527

    申请日:2006-03-15

    IPC分类号: C08F110/02

    摘要: A process for preparing crystalline ethylene (co)polymers comprising (co)polymerizing ethylene in the presence of carried out in the presence catalyst system comprising (a) a solid catalyst component comprising Ti, Mg, halogen, ORI groups, where RI is a C1-C12 hydrocarbon group optionally containing heteroatoms, having ORI/Ti molar ratio of at least 0.5, an amount of titanium, with respect to the total weight of said solid catalyst component, higher than 4% by weight, and showing a specific pattern of the SS-NMR; and (b) an aluminum alkyl compound as a cocatalyst. The process allows to obtain in good yields ethylene polymers with narrow MWD.

    摘要翻译: 在包含(a)包含Ti,Mg,卤素,ORI基团的固体催化剂组分的情况下,在存在催化剂体系的情况下,制备结晶乙烯(共)聚合物的方法,包括(共)聚合乙烯,其中RI是C1 -C12烃基,任选地含有杂原子,ORI / Ti摩尔比至少为0.5,相对于所述固体催化剂组分的总重量,钛的量高于4重量%,并且显示了 SS-NMR; 和(b)作为助催化剂的烷基铝化合物。 该方法允许以良好的产率获得具有窄MWD的乙烯聚合物。