METHOD FOR PRODUCING PROPYLENE POLYMER HAVING A HIGH MELT-FLOWABILITY

摘要

PURPOSE: A method for easily manufacturing a propylene polymer is provided to obtain a propylene polymer with high cubic regularity and excellent melt fluidity while ensure high isotatic index of 99% or more. CONSTITUTION: A method for easily manufacturing a propylene polymer comprises a step of using a catalyst system for propylene polymerization. The catalyst system for propylene polymerization comprises a Ziegler-based catalyst including magnesium, titanium, halogen and inside electron donors as a main catalyst component; an alkyl aluminum compound as a co-catalyst component; and at least one kind of dialkoxy silane-based compound and at least two kinds of trialkoxy silane-based compound as an external electrodonor.