申请人:Llatas Mendez Luis
公开号:US20080021180A1
公开(公告)日:2008-01-24
The present invention relates to chromium(III) complexes defined by following formula:
wherein:
each R
1
is independently selected from hydrogen, C
1
-C
20
alkyl, C
3
-C
20
cycloalkyl, C
6
-C
20
aryl, C
2
-C
20
alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, B; each R
2
is independently selected from hydrogen, C
1
-C
20
alkyl, C
3
-C
20
cycloalkyl, silyl, C
6
-C
20
aryl, C
2
-C
20
alkenyl, optionally comprising 1 to 5 heteroatoms such as Si, N, P, O, F, Cl, B; R
1
and R
2
can join together forming one or more aromatic or aliphatic rings optionally containing heteroatoms; each A is independently selected from nitrogen, phosphorous, As, Sb; each E is independently selected from carbon, phosphorus, nitrogen; Z is a group comprising at least a nitrogen, phosphorous, oxygen or sulfur atom which is able to coordinate to the chromium atom; Z can join one or more R
2
groups to form one or more rings; each p is independently 1 or 2; each n is independently 0, 1 or 2; each X is independently an atom or group covalently or ionically attached to the chromium atom. This invention further relates to olefin polymerization catalysts obtainable by treating a chromium complex with an organoaluminium compound. The catalyst preparation and its use in polymerization are described.
本发明涉及以下式定义的铬(III)配合物:
其中:
每个R1独立选择自氢、C1-C20烷基、C3-C20环烷基、C6-C20芳基、C2-C20烯基,可选包含1-5个杂原子,如Si、N、P、O、F、Cl、B;
每个R2独立选择自氢、C1-C20烷基、C3-C20环烷基、硅基、C6-C20芳基、C2-C20烯基,可选包含1-5个杂原子,如Si、N、P、O、F、Cl、B;
R1和R2可结合形成一个或多个含有杂原子的芳香或脂环;
每个A独立选择自氮、磷、As、Sb;
每个E独立选择自碳、磷、氮;
Z是一个包含至少一个氮、磷、氧或硫原子的基团,能够与铬原子配位;Z可以将一个或多个R2基团结合形成一个或多个环;
每个p独立选择为1或2;
每个n独立选择为0、1或2;
每个X独立为与铬原子共价或离子地连接的原子或基团。
本发明还涉及通过用有机铝化合物处理铬配合物获得的烯烃聚合催化剂。描述了催化剂的制备及其在聚合中的应用。