Supported biscyclopentadienyl metal complexes

A supported catalyst for use in polymerizing addition polymerizable monomers comprising:

• 1) a metal complex corresponding to the formula:
• ##STR4## or a dimer, solvated adduct, chelated derivative or mixture thereof, wherein:
• L independently each occurrence is a group that is bound to M via a delocalized, .pi.-bond, said L containing up to 50 nonhydrogen atoms;
• M is a metal of Group 3, 4 or the Lanthanide series of the Periodic Table of the Elements;
• Z is a covalently bound, divalent substituent of up to 50 non-hydrogen atoms having the formula, --(ER*.sub.2).sub.m --, wherein E independently each occurrence is carbon, silicon or germanium, R* independently each occurrence is selected from the group consisting of C.sub.1-20 hydrocarbyl, and C.sub.1-20 hydrocarbyloxy, with the proviso that in at least one occurrence R* is C.sub.1-20 hydrocarbyloxy, and m is an integer from 1 to 3;
• X' is a neutral Lewis base ligand having up to 20 non-hydrogen atoms;
• X" independently each occurrence is a monovalent, anionic moiety selected from hydride, halo, hydrocarbyl, silyl, germyl, hydrocarbyloxy, amide, siloxy, halohydrocarbyl, halosilyl, silylhydrocarbyl, and aminohydrocarbyl having up to 20 non-hydrogen atoms, or two X" groups together form a divalent hydrocarbadiyl or neutral hydrocarbon group;
• n is a number from 0 to 3;
• and
• p is an integer from 0 to 2
• 2) an activating cocatalyst, and
• 3) an aluminum or silicon containing substrate containing hydroxyl, --(Si--R).dbd., or --(Si--Cl).dbd. functionally wherein R is C.sub.1-10 hydrocarbyl, with the proviso that the surface hydroxyl content of a hydroxyl functionalized substrate is less than 0.8 mmol/g;
• or
• an aluminum or silicon containing substrate that has been treated with an aluminum component selected from the group consisting of alumoxane and aluminum compounds of the formula AlR'.sub.x R.sup.2.sub.y', wherein R' independently each occurrence is hydride or R, R.sup.2 is hydride, R or OR, x' is 2 or 3, y' is 0 or 1 and the sum of x' and y' is three,
• said complex being chemically bound to the substrate by reaction of the hydrocarbyloxy functionality thereof with aluminum or silicon atoms or hydroxyl, silane or chlorosilane functionality of the substrate.