Improved catalyst system for producing polyethylene copolymers in a high temperature solution polymerization process
申请人:Borealis AG
公开号:EP2933276A1
公开(公告)日:2015-10-21
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, 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) a boron containing cocatalyst
在高温溶液工艺中生产乙烯共聚物的催化剂系统,该催化剂系统包括
(i) 式(I)的茂金属络合物
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 为 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,且为 CH2-R9 基团,其中 R9 为 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,其中 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 分子环,与茚基的苯环缩合,以及
R7 和 R7'可以相同或不同,可以是 H 或线性或支链 C1-C6 烷基
(ii) 氧化铝助催化剂和 (iii) 含硼助催化剂