Process for polymerizing olefins.

摘要

A process for producing a polymer or copolymer of an alpha-olefin comprises continuously polymerizing or copolymerizing the alpha-olefin or the alpha-olefin with up to 5 mole% of a diolefin in the presence of a catalyst composed of (A) a solid magnesium compound obtained by reacting (i) an adduct formed between a magnesium halide and an electron donor, with (ii) an organometallic compound of a metal of Groups I to III of Mendelejeff's periodic table, (B) a liquid transition metal compound, and (C) an organoaluminum compound, while feeding the compound (B) separately from the other compounds (A) and (C) into a polymerization or copolymerization zone.
<??>By means of this process it is possible to produce a polymer or copolymer of narrow molecular weight distribution, while yet avoiding the requirement of known processes of supporting a transition metal compound on a magnesium-containing carrier before carrying out a polymerization or copolymerization reaction.