Solid particulate catalysts comprising bridged metallocenes

Abstract

A solid, particulate catalyst comprising: (i) a complex of Formula (I), wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from -R'2C-, -R'2C-CR'2-, -R'2Si-, -R'2Si-SiR'2-, -R'2Ge-, 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; each R1 independently is a linear or branched C1-C20 hydrocarbyl radical optionally containing one or more heteroatoms from groups 14-16; T1 and T4, which can be the same or different, are an OR<2>, a SR<2>, CH(R<18>)2, CH2R<18>, aryl or heteroaryl group; each R<2>, which can be the same or different, is a C1-C20 hydrocarbyl radical; each R<18>, which can be the same or different, is a C1-C20 hydrocarbyl radical or two R<18> groups together with the carbon atom to which they are attached may form a cyclic C4-C20 hydrocarbyl group; T2 and T3, which may be the same or different, are a C(R<18>)3 group; W1 and W2, which may be the same or different, are a 5 or 6 membered aryl or heteroaryl ring wherein each atom of said ring is optionally substituted with an R<5> group; each R<5>, which can be the same or different, is a C1-C20 hydrocarbyl radical optionally containing one or more heteroatoms belonging to groups 14-16; and optionally two adjacent R<5> groups taken together can form a further mono or multicyclic ring condensed to W1 or W2, optionally substituted by one or two groups R5; and (ii) a cocatalyst.

Description

technical field [0001] The present invention relates to catalysts comprising bridged bisindenyl II-ligands for forming olefin polymerization catalysts, and their use in olefin polymerization. In particular, the present invention relates to catalysts comprising certain bridged bis-indenyl complexes in solid form, and especially in solid form without the use of external supports. Background technique [0002] Metallocene catalysts have been used for many years to make polyolefins. Numerous academic publications as well as patent publications describe the use of these catalysts in the polymerization of olefins. Metallocenes, in particular cyclopentadienyl-based catalyst systems with different substitution patterns are currently used industrially to produce polyethylene and polypropylene. [0003] These metallocenes can be used in solution polymerizations or they can be supported on conventional supports such as silica. [0004] In WO 03 / 051934 the inventors propose an altern...

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