Patent ID: 9567351
Date: 2017-02-14
CPC Classifications: C07C,C07F,C08F,C08L

Claim:
1. A heterophasic polypropylene resin comprising an asymmetrical metallocene-produced polypropylene homopolymer phase (A) and an asymmetrical metallocene-produced ethylene-propylene copolymer phase (B) dispersed within the phase (A), wherein the same asymmetrical metallocene catalyst is used to produce the phase (A) and the phase (B), and wherein the xylene soluble (XS) fraction of the heterophasic polypropylene resin is in the range 20 to less than 50 wt %; the heterophasic polypropylene resin has an MFR the ethylene content of the xylene soluble fraction of the heterophasic polypropylene resin is in the range of at least 20 wt % to less than 50 wt %; the MFR the MFR the heterophasic polypropylene resin has a notched Charpy impact strength at −20° C. that is at least 75 kJ/m 2 .