PROCESS FOR PREPARING OLEFIN POLYMERS OR COPOLYMERS

摘要

The invention is a process for obtaining highly stereoregular poly or or copolymers. The process comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising: a solid complex titanium component at least containing magnesium, titanium and halogon, an organometallic compound of a metal of Groups I to III of the periodic table, and an organic acid anhydride.