申请人:Idemitsu Kosan Co., Ltd.
公开号:US05747614A1
公开(公告)日:1998-05-05
A catalyst for producing a styrenic polymer which comprises an (A) transition metal compound having one and only one .pi.-ligand comprising only one indenyl group, said indenyl group bearing a substituent group at at least the 1-, 2-, or 3-positions of the indenyl ring, and wherein the transition metal is preferably at least one metal selected from the group consisting of titanium, zirconium, hafnium, niobium and tantalum, and optionally (B) at least one compound selected from the group consisting of 1 an aluminoxane and 2 an ionic compound comprising an anion that does not coordinate to the transition metal compound of component (A) in its cationic form, and a cation, and further optionally (C) a Lewis acid; and a process for producing a styrenic polymer using the catalyst.
一种制备苯乙烯聚合物的催化剂,包括(A)一种过渡金属化合物,其具有仅有一个.pi.配体,该配体仅包含一个茚基团,该茚基团在其1-,2-或3-位置上至少带有一个取代基团,所述过渡金属优选为钛、锆、铪、铌和钽中的至少一种金属;可选的(B)至少一种化合物,所述化合物选自1个铝氧烷和2个离子化合物,所述离子化合物包括一个阴离子,在其阳离子形式中不与组分(A)的过渡金属化合物配体配位;进一步可选的(C)一种路易斯酸;以及使用该催化剂制备苯乙烯聚合物的方法。