Patent ID: 9040633
Filing Date: 2015-05-26
Classification: C08L

Abstract:
1. A polymer composition, comprising (i) a polypropylene matrix, wherein the polypropylene matrix is present in an amount of at least 60 wt %, based on the weight of the polymer composition, and said polypropylene matrix has a melt flow rate (MFR) of 10-30 g/10 min and a molecular weight distribution (MWD) of 5-8, (ii) a first elestomeric phase dispersed within the matrix and having a glass transition temperature Tg1, measured with dynamical mechanical thermal analysis according to ISO 6721-2, within the range of −58° C. to −64° C. wherein the first elastomeric phase comprises an ethylene copolymer having comonomer units derived from C (iii) a second elastomeric phase dispersed within the matrix, wherein the second elestomeric phase is crosslinked polybutadiene, and has a glass transition temperature Tg2, measured with dynamical mechanical thermal analysis according to ISO 6721-2, within the range of −75° C. to −85° C., wherein the second elastomeric phase is present in the form of discrete particles having a mean particle size from 250 to 500 nm, wherein the second elestomeric phase is present in an amount of 10 to 17 wt % based on the weight of the polymer composition,