| abstract |
PROBLEM TO BE SOLVED: To provide a propylene-based polymer useful as a substitute for a soft vinyl chloride resin, and a propylene-based polymer composition capable of producing films and molded articles having excellent transparency and rigidity. To do. SOLUTION: It is a propylene homopolymer, and has an isotactic pentad fraction (mmmm) exhibiting stereoregularity. Fraction) is 30 to 80%, and the molecular weight distribution (Mw / Mn) is 3. A propylene polymer having an intrinsic viscosity [η] of 0.8 to 5 deciliter / g or less, a propylene polymer comprising propylene and ethylene and / or an α-olefin having 4 to 20 carbon atoms, Regularity index (P) is 55 ~ 90 mol%, molecular weight distribution (Mw / Mn) is 3.5 or less, A propylene polymer having an intrinsic viscosity [η] of 0.8 to 5 deciliter / g, and one nucleating agent added to the propylene polymer. It is a propylene polymer composition added with 0 ppm or more. |