A process for forming a coordination catalyst
system comprising sequentially or substantially simultaneously contacting: (I) pre-catalyst reactants comprising (a) at least one first ligand-containing reactant; and (b) at least one first
transition metal reactant suitable to form at least one
metallocene or constrained geometry pre-catalyst compound (e.g., rac-
ethylene bis(indenyl)
zirconiUm dichloride); an optionally (c) at least one second ligand-containing reactant and (d) at least one second
transition metal reactant suitable to form at least one non-
metallocene, non-constrained geometry, bidentate or tridentate
transition metal compound (e.g., tridentate 2,6-diacetylpyridine-bis(2,4,6-trimethylanaline)FeCl2) and (II) further contacting, jointly or individually, the pre-catalyst compound(s) and optional bidentate or tridentate compound(s) with at least one support-activator
agglomerate (e.g.,
spray dried silica / clay
agglomerate). When individually contacted, the supported catalyst components can be mixed or blended. The resulting transition
metal catalyst systems are suitable for addition
polymerization of unsaturated monomers, e.g.,
ethylene and propylene.