Patent ID: 8314180

Claim:
Heterophasic propylene copolymer comprising a propylene homopolymer (PPH) and an ethylene-propylene rubber (EPR), wherein the heterophasic propylene copolymer has a melt flow index in the range from 1 dg/min to 2 dg/min (measured according to ISO 1133, condition 1,230° C., 2.16 kg), a molecular weight distribution M w/M n in the range from 8.5 to 10.0 (measured on pellets) and a total ethylene content in the range from 6.0 wt % to 11.0 wt % relative to the total weight of the heterophasic propylene copolymer, wherein the EPR is present in an amount from 10.0 wt % to 16.0 wt % of the total weight of the heterophasic propylene copolymer, wherein the ratio of intrinsic viscosities η EPR /η PPH (measured in tetralin at 135° C.) is in the range from 1.70 to 2.00, and wherein the ratio of the amount of EPR and the total ethylene content (wt % EPR/wt % ethylene) is in the range from 1.30 to 1.90.