Patent ID: 7365039

Claim:
A catalyst composition comprising: a catalyst compound selected from the group consisting of Group 4 metal complexes containing one or more ligands that are π-bonded to the transition metal, and metal complexes of the formula, wherein R 1 is selected from alkyl, cycloalkyl, heteroalkyl, cycloheteroalkyl, aryl, and inertly substituted derivatives thereof containing from 1 to 30 atoms not counting hydrogen, T is a divalent bridging group of from 1 to 20 atoms not counting hydrogen, R 2 is a C 6-20 heteroaryl group containing Lewis base functionality, M is the Group 4 metal, X e is an anionic, neutral or dianionic ligand group, x is a number from 0 to 5 indicating the number of such X e groups, and bonds, optional bonds and electron donative interactions are represented by lines, dotted lines and arrows respectively; and an activator capable of converting said catalyst compound into an active catalyst for addition polymerization; optionally a carrier; optionally a liquid diluent, and a hydroxycarboxylate metal salt additive corresponding to the formula: wherein R e and R f independently each occurrence are hydrogen, halogen, or C 16 alkyl.