Patent ID: 9045629
Filing Date: 2015-06-02
Classification: C08L

Abstract:
1. A polypropylene composition comprising, percent by weight: a) 70 to 77 wt. % of a crystalline propylene polymer comprising an amount of isotactic pentads (mmmm) higher than 97.5 molar %, measured by b) 9 to 12 wt. % of an elastomeric copolymer of ethylene and propylene, wherein the elastomeric copolymer of ethylene and propylene has: c) 16 to 20 wt % of a polyethylene homopolymer comprising an intrinsic viscosity value ranging from 2.0 to 2.7 dl/g; wherein the polypropylene composition has: (i) a flexural modulus value ranging from 1400 to 1600 MPa, according to ISO method 178; (ii) a stress-whitening resistance values corresponding to a diameter of a whitened area of at most 1.7 cm caused by a ram falling from a 76 cm height, and a diameter of a whitened area of at most 1.2 cm caused by a ram falling from a 20 cm height; and (iii) an Izod impact resistance value at −20° C. from 7.5 to 10.6 kJ/m