Patent ID: 6720394
Filing Date: 2004-04-13
Classification: C08F,Y10S

Abstract:
A process for the preparation of a supported olefin polymerization catalyst composition, comprising a support, a metallocene, and an alumoxane, wherein a support comprising a porous carrier is contacted, in any order, with at least one member of the group consisting of(a) an organometallic compound of the general formula (1): R1MXvâˆ’1â€ƒâ€ƒ(1) â€ƒwherein each R is the same or different and is a C1-C10 alkyl group; M is a metal of Group 1, 2, 12 or 13 of the Periodic Table; each X is the same or different and one of a halogen atom, a hydrogen atom, a hydroxyl radical or a C1-C8 hydrocarbyloxy group; I is 1, 2 or 3; v is the oxidation number of the metal M, and with a complex solution of at least(b) a metallocene of the general formula (2): (CpY)mMâ€²Xâ€²nZo â€ƒwherein each CpY is the same or different and is one of a mono- or polysubstituted, fused or non-fused, homo- or heterocyclic cyclopentadienyl, indenyl, tetrahydro-indenyl, fluorenyl, or octahydrofluorenyl ligand, which ligand is substituted at its cyclopentadienyl ring with at least one substituent Y which is one of a â€”ORâ€², â€”SRâ€², â€”NRâ€²2, or â€”PRâ€²2 radical, each Râ€² being the same or different and is one of a tri-C1-C8 hydrocarbylsilyl group or a tri-C1-C8 hydrocarbyloxy silyl group; Mâ€² is a transition metal of Group 4 of the Periodic Table and bound to the ligand CpY at least in an N5 bonding mode; each Xâ€² is the same or different and is one of a hydrogen atom, a halogen atom, a C1-C8 hydrocarbyl group, a C1-C8 hydrocarbylheteroatom group or a tri-C1-C8 hydrocarbyl silyl group or two Xâ€² form a ring with each other; Z is a bridge atom or group between two CpY ligands, or one CpY ligand and the transition metal Mâ€²; m is 1 or 2; o is 0 or 1â€² and n is 4-m if there is no bridge Z or Z is a bridge between two CpY ligands, or n is 4-m-o if Z is a bridge between one CpY ligand and the transition metal Mâ€², and (c) an alumoxane of one of the following formulas (3): wherein each Râ€³ and each Râ€²â€³ is the same or different and is a C2-C12 alkyl group; and p is an integer between 1 and 40; and recovering said supported olefin polymerization catalyst composition.