Olefin addition polymerization catalyst composition

摘要

PCT No. PCT/US96/19968 Sec. 371 Date Sep. 2, 1998 Sec. 102(e) Date Sep. 2, 1998 PCT Filed Dec. 18, 1996 PCT Pub. No. WO97/27228 PCT Pub. Date Jul. 31, 1997Catalyst compositions that are highly tolerant of catalyst poisons comprising a cationic or zwitterionic Group 4 metal complex of the constrained geometry type and an organoaluminum hydrocarbyloxide compound according to the formula R12Al(OR2), wherein R1 and R2 independently each ocurrence are C1-30 hydrocarbyl, the molar ratio of complex to organoaluminum hydrocarbyloxide compound being from 1:0.1 to 1:100.