Patent ID: 7205364

Claim:
A process for the polymerization of one or more aliphatic alpha olefins comprising conducting the polymerization in the presence of a catalyst system comprising: (A) a Group IV B transition metal component of the formula: or wherein “M” is Zr, Hf or Ti; (C 5 H 5-x R x ) is a cyclopentadienyl ring which is substituted with from zero to five substituent groups R, “x” is 0, 1, 2, 3, 4 or 5 denoting the degree of substitution, and each R is, independently, a radical selected from a group consisting of C 1 –C 20 hydrocarbyl radicals, C 1 –C 20 substituted hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, C 1 –C 20 hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from Group IV-A of the Periodic Table of Elements, and halogen radicals or (C 5 H 5-x R x ) is a cyclopentadienyl ring in which two adjacent R-groups are joined forming a C 4 –C 20 ring to give a saturated or unsaturated polycyclic cyclopentadienyl ligand; (JR′ z-1 ) is a heteroatom ligand in which “J” is an element with coordination number of three from Group V-A or an element with a coordination number of two from VI-A of the Periodic Table of Elements, each “R” is, independently a radical selected from a group consisting of C 1 –C 20 hydrocarbyl radicals, substituted C 1 –C 20 hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, and “z” is the coordination number of the element “J”; each “Q” is, independently, any univalent anionic ligand or two “Q” is are a divalent anionic chelating ligand, provided that “Q” is different from (C 5 H 5-x R x ); “L” is a neutral Lewis base where “w” is a number greater than 0 and up to 3; “M” has the same meaning as “M”; and “Q” has the same meaning as “Q”; and (B) an alumoxane.