Heterophasic polypropylene with excellent creep performance

摘要

Heterophasic propylene copolymer comprising
(a) a matrix (M) being a polypropylene (PP), said polypropylene (PP) has a polydispersity index (PI) of at least 5.0,
and
(b) an elastomeric propylene copolymer (EC) dispersed in said matrix (M),
wherein
(i) said heterophasic propylene copolymer has a melt flow rate MFR 2 (230 °C) of equal or below 1.0 g/10min,
(ii) the amorphous phase (AM) of the xylene cold soluble fraction (XCS) of the heterophasic propylene copolymer has an intrinsic viscosity (IV) of at least 3.5 dl/g.