POLYMERIZATION METHOD OF ALPHA-OLEFIN

摘要

PROBLEM TO BE SOLVED: To provide a polymerization method which can provide a high catalyst yield for anα-olefin which has a significantly higher bulk density than that obtained by the known method. SOLUTION: At least oneα-olefin is contacted under polymerization conditions with a catalyst system which comprises (a) a solid catalyst which contains (i) a compound of groups IV to VI transition metals in the periodic table which contains at least one cyclopentadiene ligand which may have substituents, (ii) an activating agent selected from aluminoxanes or ionizing agents and (iii) a porous polymer support which has an intraparticle pore volume of at least 0.2 cm3/g made of pores having a radius of 1,000-75,000Åand (b) at least one organic aluminum compound of the formula: R3-nAl(Y')n (wherein 0.9