Supported metallocene catalyst system and method for polymerizing olefins
    6.
    发明授权
    Supported metallocene catalyst system and method for polymerizing olefins 失效
    负载金属茂催化剂体系及烯烃聚合方法

    公开(公告)号:US06239060B1

    公开(公告)日:2001-05-29

    申请号:US09224176

    申请日:1998-12-31

    IPC分类号: B01J3502

    摘要: The present invention provides a new type of supported metallocene catalyst system. In one aspect of the invention, an inorganic oxide support, such as silica, is impregnated with a Group XIII element such as B, Al or GA. The support is then contacted with a liquid catalyst system prepared by combining in a liquid an organo aluminoxane and a metallocene having two cyclopetadienyl-type ligands selected from substituted or unsubstituted cyclopentadienyl, indenyl, benzoindenyl, tetrahdroindenyl, benzofluorenyl, octahydrofluorenyl, and fluorenyl ligands to form a supported metallocene catalyst system. In preferred embodiments the process further includes conducting prepolymerization of at least one olefin in the presence of the supported metallocene catalyst system to produce a prepolymerized metallocene catalyst system. The prepolymerized metallocene catalyst system prepared in this manner yields substantially increased activity for the polymerization of olefins. In another aspect, the present invention also provides a method for polymerization of olefins using the inventive supported metallocene catalyst system.

    摘要翻译: 本发明提供一种新型的负载型茂金属催化剂体系。 在本发明的一个方面,无机氧化物载体如二氧化硅用第ⅩⅢ族元素如B,Al或GA浸渍。 然后将载体与通过在液体中组合有机铝氧烷和具有选自取代或未取代的环戊二烯基,茚基,苯并茚基,四氢茚基,苯并芴基,八氢芴基和芴基配体的两个环戊二烯基型配体的金属茂接触而形成的液体催化剂体系形成 负载金属茂催化剂体系。 在优选的实施方案中,该方法还包括在负载的茂金属催化剂体系的存在下进行至少一种烯烃的预聚合,以产生预聚合的茂金属催化剂体系。 以这种方式制备的预聚合的茂金属催化剂体系产生了烯烃聚合的显着提高的活性。 另一方面,本发明还提供使用本发明的负载型茂金属催化剂体系聚合烯烃的方法。