申请人:BOREALIS AG
公开号:US20150344596A1
公开(公告)日:2015-12-03
A catalyst comprising
(i) an asymmetric complex of formula (I)
wherein
M is zirconium or hafnium;
each X is a sigma ligand;
L is a divalent bridge selected from —R′
2
C—, —R′
2
C—CR′
2
—, —R′
2
Si—, —R′
2
Si—SiR′
2
—, —R′
2
Ge—, wherein each R′ is independently a hydrogen atom, C1-C20-alkyl, tri(C1-C20-alkyl)silyl, C6-C20-aryl, C7-C20-arylalkyl or C7-C20-alkylaryl;
R
2
and R
2′
are each independently linear C
1-10
hydrocarbyl;
R
5
and R
5′
are each independently hydrogen or a C1-20 hydrocarbyl group;
R
6
and R
6′
are each independently hydrogen or a C1-20 hydrocarbyl group;
R
7
is hydrogen or a C1-20 hydrocarbyl group or is ZR
3
;
Z is O or S, preferably O;
R
3
is a C1-10 hydrocarbyl group;
Ar is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R
8
;
Ar′ is an aryl or heteroaryl group having up to 20 carbon atoms optionally substituted by one or more groups R
8′
; and
R
8
and R
8′
are each independently is a C1-20 hydrocarbyl group;
with the proviso that at least one of R
6
or R
7
is not H;
and (ii) a cocatalyst comprising a compound of a group 13 metal, e.g. boron.
一种催化剂,包括(i) 公式(I)的不对称配合物,其中 M 是锆或铪;每个 X 是一个sigma 配体;L 是选择自—R′2C—,—R′2C—CR′2—,—R′2Si—,—R′2Si—SiR′2—,—R′2Ge—的二价桥,其中每个 R′ 独立地是氢原子,C1-C20-烷基,三(C1-C20-烷基)硅基,C6-C20-芳基,C7-C20-芳基烷基或 C7-C20-烷基芳基;R2 和 R2′ 各自独立地是线性 C1-10 碳氢基;R5 和 R5′ 各自独立地是氢或 C1-20 碳氢基团;R6 和 R6′ 各自独立地是氢或 C1-20 碳氢基团;R7 是氢或 C1-20 碳氢基团或是 ZR3;Z 是 O 或 S,优选 O;R3 是 C1-10 碳氢基团;Ar 是最多有 20 个碳原子的芳基或杂芳基团,可选地被一个或多个 R8 基团取代;Ar′ 是最多有 20 个碳原子的芳基或杂芳基团,可选地被一个或多个 R8′ 基团取代;而 R8 和 R8′ 各自独立地是 C1-20 碳氢基团;但至少有一个 R6 或 R7 不是 H;以及 (ii) 包括第 13 族金属化合物(例如硼)的协同催化剂。