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    • 4. 发明授权
    • Multinuclear half metallocene catalyst and preparation of styrene polymer using the same
    • 多核半茂金属催化剂和使用苯乙烯聚合物的制备
    • US06894129B2
    • 2005-05-17
    • US10380022
    • 2002-07-11
    • Min-Hyung LeeYou-Mi JeongJin-Young Ryu
    • Min-Hyung LeeYou-Mi JeongJin-Young Ryu
    • C08F4/60C07F17/00C08F4/642C08F4/6592C08F4/76C08F12/00C08F12/04C08F4/64C08F112/08
    • C07F17/00C08F4/65912C08F12/08C08F2410/03C08F2420/04C08F4/6592
    • The present invention relates to a catalyst for preparing vinyl aromatic polymer and styrene polymerization using the same, and particularly to a transition metal half metallocene catalyst with a novel structure for preparing syndiotactic styrene polymer having high activity, superior stereoregularity, high melting point and various molecular weight distributions and a process for preparing styrene polymer using the same. The present invention provides a multinuclear half metallocene compound in which two or more of transition metals of groups 3 to 10 on periodic table are connected through bridge ligand simultaneously containing π-ligand cycloalkandienyl group and σ-ligand functional group and its preparation, and a process for preparing styrene polymer using the compound as a catalyst. Polymers with various molecular weight distributions as well as vinyl aromatic polymer having predominant syndiotactic structure can be prepared with high activity using the multinuclear half metallocene catalyst.
    • 本发明涉及一种用于制备乙烯基芳族聚合物的催化剂和使用该催化剂的苯乙烯聚合反应,特别涉及一种具有新型结构的过渡金属半茂金属催化剂,用于制备具有高活性,优异的立构规整性,高熔点和各种分子的间同立构苯乙烯聚合物 重量分布和使用其制备苯乙烯聚合物的方法。 本发明提供了一种多核半茂金属化合物,其中周期表上的3至10族的过渡金属中的两种或更多种通过桥联配体连接,同时含有π-配体环二烷基和σ-配体官能团及其制备方法 用于制备使用该化合物作为催化剂的苯乙烯聚合物。 具有各种分子量分布的聚合物以及具有主要间同立构结构的乙烯基芳族聚合物可以使用多核半茂金属催化剂以高活性制备。