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    • 11. 发明授权
    • Supported single-site catalysts useful for olefin polymerization
    • 用于烯烃聚合的支持的单中心催化剂
    • US06673882B2
    • 2004-01-06
    • US09781464
    • 2001-02-12
    • Jia-Chu Liu
    • Jia-Chu Liu
    • C08F442
    • C08F10/00C08F4/659C08F4/65912C08F110/02Y10S526/943C08F4/65916C08F2500/12C08F2500/03C08F2500/18
    • A method for making supported single-site catalysts useful for olefin polymerization is disclosed. An organometallic complex that contains a nitrogen-functional heterocyclic ligand is first prepared and reacted with an alumoxane. This product is then combined, preferably with high-intensity mixing, with a slurry of inorganic support, followed by solvent removal to give a supported catalyst. By introducing the alumoxane at the right time during preparation, and by judicious selection and chemical treatment of the inorganic support, one can make catalysts with high activity and good aging properties. The supported catalysts give olefin polymers with a favorable balance of physical properties, including low density, narrow molecular weight distribution, good melt-flow properties, and high bulk density.
    • 公开了一种制备用于烯烃聚合的负载型单中心催化剂的方法。 首先制备含有氮官能杂环配体的有机金属络合物,并与铝氧烷反应。 然后将该产物与优选与高强度混合的无机载体浆料混合,然后除去溶剂得到负载型催化剂。 通过在制备过程中合适的时间引入铝氧烷,通过对无机载体的合理选择和化学处理,可以制备具有高活性和良好老化性能的催化剂。 负载型催化剂得到物理性能良好平衡的烯烃聚合物,包括低密度,窄分子量分布,良好的熔体流动性能和高堆积密度。