Solid titanium catalyst component, olefin polymerization catalyst, olefin polymerization method, and propylene polymer

Abstract

A propylene polymer has a melt flow rate (MFR), as determined under conditions of a measurement temperature of 230° C. in accordance with ASTM 1238 standard, in a range of 0.01 g/10 min or more and 1000 g/10 min or less. The propylene polymer further has a maximum temperature (Tm−maxv) at which heat absorption is zero in differential scanning calorimetry (DSC) at a heating condition of 10° C./min, of 169.0° C. or higher and 220° C. or lower. The propylene polymer satisfies two or more of the following requirements: (Mz/Mw determined by gel permeation chromatography (GPC) is 3.50 or more and 5.65 or less; a difference between Mw/Mn and Mz/Mw determined by GPC is 8.3 or less; and a decane soluble component content (C10sol.)(/wt %) and MFR (/(g/10 min)) that satisfies the following relational expression: ( C ⁢ 10 ⁢ sol . ) - 4 / 3 × Log ( MFR ) ≤ 2 . 3 ⁢ 0 .

Dependencies are inferred from the claim text.