Patent ID: 6114270
Filing Date: 2000-09-05
Classification: B01J,C08F,Y10S

Abstract:
A catalyst system which comprises:(a) a co-catalyst; and(b) a catalyst which comprises:(i) a Group 3 to 10 transition metal;(ii) an alkyl- or arylimido ligand;(iii) a polymerization-stable, anionic ligand selected from the group consisting of boraaryl, pyrrolyl, and azaborolinyl; and(iv) optionally, a ligand selected from the group consisting of halide, C.sub.1 -C.sub.20 alkoxy, C.sub.1 -C.sub.20 siloxy, dialkylamido, C.sub.1 -C.sub.12 hydrocarbyl, and hydride.