| 摘要 |
PURPOSE:To make it possible to form a propylene homopolymer composition which yields a sheet remarkably excellent in secondary processability, rigidity and heat-resistant rigidity, by mixing a specified propylene homopolymer with a phosphate compound. CONSTITUTION:100pts.wt. polymer (X) is mixed with 0.01-1pt.wt. phosphate compound of formula II (wherein R1 is a 1-4 C alkylidene or the like, R2 and R3 are each H or a 1-8 C alkyl, M is a mono- to tri-valent metal and n is an integer of 1-3). Polymer (X) is a crystalline propylene homopolymer obtained by polymerizing propylene in multiple stages so that 35-65wt.% of the total polymer by the formed in each of the first and second or latter stages, and satisfying formula I (wherein [eta]H is the intrinsic viscosity of the polymer portion of a higher MW and [eta]L) is the intrinsic viscosity of the polymer portion of a lower MW and the relationship of 1.00>=0.015log MFR+0.955, wherein P is the isotactic pentad fraction of the total polymer and MFR is its melt flow rate.
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