Embodiments of the present disclosure directed towards polymerization catalysts having improved ethylene enchainment and/or improved catalyst productivity. As an example, the present disclosure provides a polymerization catalyst of Formula (I), wherein each of R
1
to R
12
is independently a C
1
to C
20
alkyl, aryl or aralkyl group, or a hydrogen, wherein at least one of R
4
to R
7
is not a hydrogen, wherein M is a Group 4 metal, and wherein, each X is independently a halide, C
1
to C
20
alkyl, aralkyl or hydrogen
Fluxional catalysts and related ligands containing bulky substituents
申请人:BP Corporation North America Inc.
公开号:US06479424B1
公开(公告)日:2002-11-12
A ligand useful to form a metallocene olefin polymerization catalyst comprises:
wherein at least R3 and R4 are substituents having at least a bulk of a t-butyl group and, optionally, wherein R1 or R2 may be a bulky substituent group.
LIGANDS AND CATALYSTS FOR PRODUCING ELASTOMERIC PROPYLENE POLYMERS
申请人:BP Corporation North America Inc.
公开号:EP1157047B1
公开(公告)日:2003-04-23
Transition metal compound and catalyst for olefin polymerization
申请人:Hanaoka Hidenori
公开号:US08383848B2
公开(公告)日:2013-02-26
A transition metal compound represented by the formula (1-1) or the formula (1-2) (M is a transition metal atom) and a process for producing a catalyst for olefin polymerization comprising a step of bringing the transition metal compound into contact with a co-catalytic component for activation.