Substituted Metallocene Catalysts

摘要

This invention relates to novel bridged a hafnium transition metal metallocene catalyst compounds having two indenyl ligands substituted at the 4 positions with a C1 to C10 alkyl, where the 3 positions are hydrogen (assuming the bridge position is counted as the one position) and the bridging atom is carbon or silicon which is incorporated into a cyclic group comprising 3, 4, 5, or 6 silicon and/or carbon atoms that make up the cyclic ring.

主权项

1. A metallocene catalyst compound represented by the formula:where each R3 is hydrogen; each R4 is independently a C1-C10 alkyl; each R2 and R7 is independently hydrogen, or C1-C10 alkyl, each R5 and R6 is independently hydrogen, C1-C50 substituted or unsubstituted hydrocarbyl, or C1-C50 substituted or unsubstituted halocarbyl; and R4 and R5, R5 and R6 and/or R6 and R7 may optionally be bonded together to form a ring structure; J is a bridging group represented by the formula Ra2J, where J is C or Si, and each Ra is, independently, C1 to C20 substituted or unsubstituted hydrocarbyl, and the two Ra form a cyclic structure incorporating J and the cyclic structure may be a saturated or partially saturated cyclic or fused ring system; and each X is a univalent anionic ligand, or two Xs are joined and bound to the metal atom to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand.