HDPE-CONTAINING IMPACT MODIFIER POLYOLEFIN COMPOSITION

摘要

Polyolefin compositions comprising: (A) 5-35% by weight of a propylene-based polymer containing 90% by weight or more of propylene units and containing 10% by weight or less of a fraction soluble in xylene at 25°C (XSA); (B) 25-50% by weight, of an ethylene homopolymer containing 5% by weight or less of a fraction soluble in xylene at 25°C (XSB) referred to the weight of (B); and (C) 30-60% by weight, of a copolymer of ethylene and propylene containing from 25% to 75% by weight of ethylene units and containing from 55% to 95% by weight, of a fraction soluble in xylene at 25°C (XSC). The composition has 20% by weight or less of a fraction obtained in the second fractionation step in a preparative fractionation method.