Nonsymmetric catalysts comprising salan ligands

摘要

Catalysts comprising a non-symmetrical Salan ligand with a carbazole moiety. Also disclosed are catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.

主权项

1. A catalyst compound represented by the formula: M is a Group 4, 5 or 6 transition metal; each X is, independently, a univalent C1 to C20 hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X1 and X2 join together to form a C4 to C62 cyclic or polycyclic ring structure; each R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, and R21 is, independently, a hydrogen, a C1-C40 hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R1 to R21 may independently join together to form a C4 to C62 cyclic or polycyclic ring structure, or a combination thereof; subject to the proviso that R19 is not a carbazole or a substituted carbazole radical, Y is a divalent C1 to C20 hydrocarbyl radical.