High stiffness propylene polymer composition.

摘要

A high stiffness propylene polymer composition comprising 100 parts by weight of a crystalline propylene homopolymer or crystalline ethylene-propylene block copolymer having a specific molecular weight distribution and a specific isotactic pentad ratio and from 0.01 to 1 part by weight of a phosphate compound represented by formula (I) wherein R1, R2, R3, M and n are as defined in the specification. The composition is excellent in post-processability of a sheet when molded into a sheet, blow moldability, stiffness, and heat distortion resistance.