CROSS-LINKED POLYMER COMPOSITION CONTAINING A POLYPROPYLENE-ETHYLENE COPOLYMER AND AN ETHYLENE-α-OLEFIN COPOLYMER

摘要

The invention relates to a cross-linked polymer composition containing 40-90 wt.% propylene-ethylene copolymer with 8-20 wt.% ethylene and 10-60 wt.% ethylene-α-olefin copolymer with 75-90 wt.% ethylene and a density of 920-890 kg/m3, having a notched Izod impact strength » 10kJ/m2 at -20 °C and a flexural modulus higher than 500 MPa. The cross-linked polymer composition is prepared by melting and kneading propylene-ethylene copolymer and ethylene-α-olefin copolymer in the presence of a radical forming agent, a cross-linking agent and, eventually a peroxide inhibitor.