Patent ID: 7875679

Claim:
A polypropylene resin composition comprising: a) from 40 wt % to 80 wt % of component A selected from a propylene homopolymer or a propylene copolymer comprising at most 5 wt % of a comonomer selected from ethylene, a C 4-12 α-olefin, or mixtures thereof; and b) from 20 wt % to 60 wt % of component B comprising B-1 and B-2, wherein B-1 is a copolymer of propylene with ethylene having a propylene content from 55 wt % to 85 wt %, and B-2 is a propylene copolymer comprising 15 wt % to 50 wt % of propylene, comprising a comonomer selected from ethylene, a C 4-12 α-olefin, or mixtures thereof; and having a molecular weight distribution by gel permeation chromatography of 3.0 or less and a blockness by NMR of 0.8 or less; wherein the composition comprises at least 3 wt % of B-2, and has an intrinsic viscosity ratio of B-1 to A at most of 1.5 and an intrinsic viscosity ratio of B-1 to B-2 at least 0.8.