abstract |
To provide a polypropylene composition having excellent flexibility and impact resistance, as well as excellent heat resistance and low-temperature heat sealability. A polypropylene composition comprises [A] polypropylene in a specific amount ratio and [B] specific [B-1] or [B-2]. [B-1] Propylene / 1-butene elastomer has (1) 1-butene unit content of 5 to 50 mol%, (2) triad tacticity of 90% or more, and (3) intrinsic viscosity of 0.1. -12 dl / g, (4) molecular weight distribution is 3 or less, (5) B value is 1.0 to 1.5, and [B-2] propylene / ethylene elastomer has (1) propylene unit content of 50 ~ 95 mol%, (2) Triad tacticity is 90% or more, (3) Proportion of position irregular units based on 2,1-insertion of propylene is 0.05% or more, and (4) Intrinsic viscosity is 0.0. 1-12 dl / g. [Selection figure] None |