Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising (i) a metallocene complex of formula (I) wherein M is Hf or Zr X is a sigma ligand, L is a bridge of the formula —SiR82—, wherein each R8 is independently a C1-C20-hydrocarbyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl n is 0, 1 or 2 R1 and R1′ are the same or can be different and can be a linear or branched C1-C6-alkyl group, R2 and R2′ are the same or are different and are a CH2—R9 group, with R9 being H or linear or branched C1-C6-alkyl group R5 and R5′ are the same or are different and can be H or a linear or branched C1-C6-alkyl group or a OR group, wherein R is a C1-C6-alkyl group R6 and R6′ are the same or are different and can be H or a C(R10)3 group, with R10 being the same or different and R10 can be H or a linear or branched C1-C6-alkyl group or R5 and R6 and/or R5′ and R6′ taken together form an unsubstituted 4-7 membered ring condensed to the benzene ring of the indenyl moiety, with the proviso that if R5 and R6 as well as R5′ and R6′ taken together form an unsubstituted 5 membered ring condensed to the benzene ring of the indenyl moiety then R2 and R2′ are not a C1-alkyl group; and R7 and R7′ can be the same or are different and can be H or a linear or branched C1-C6-alkyl group (ii) an aluminoxane cocatalyst and (iii) optionally a boron containing cocatalyst.
用于在高温溶液工艺中生产
乙烯共聚物的催化剂体系,该催化剂体系包括(i)式(I)的茂
金属配合物 其中M是Hf或Zr X是σ
配体,L是式-SiR82-的桥,其中每个R8独立地是C1-C20-氢羰基、三(C1-C20-烷基)
硅烷基、C6-C20-芳基、C7-C20-芳基烷基或C7-C20-烷基芳基 n是0、1 或 2 R1 和 R1′ 相同或不同,可以是直链或支链 C1-C6 烷基,R2 和 R2′ 相同或不同,是
CH2-R9 基团,其中 R9 是 H 或直链或支链 C1-C6 烷基 R5 和 R5′ 相同或不同,可以是 H 或直链或支链 C1-C6 烷基或 OR 基团、其中R是C1-C6-烷基 R6和R6′相同或不同,可以是H或C(R10)3基团,R10相同或不同,R10可以是H或直链或支链C1-C6-烷基,或R5和R6和/或R5′和R6′共同形成一个未取代的4-7位环,缩合到
茚基的苯环上、但如果 R5 和 R6 以及 R5′ 和 R6′ 合在一起形成一个与
茚基的苯环缩合的未取代的 5 分子环,则 R2 和 R2′ 不是 C1-烷基;R7和R7′可以相同或不同,可以是H或直链或支链C1-C6-烷基 (ii) 氧化铝助催化剂和 (iii) 可选的含
硼助催化剂。