| 摘要 |
Heterophasic polypropylene copolymers having an MFR (2.16 kg, 230°C) of 15 to 200 g/10 min, determined according to ISO 1133 comprising a propylene homo- or copolymer matrix with an MFR (2.16 kg, 230°C) of 80 to 500 g/10 min, determined according to ISO 1133 (A) and an ethylene or C 4 -C 10 -alpha-olefin propylene rubber phase (B) dispersed within the matrix, wherein the heterophasic polypropylene resin has a fraction soluble in p-xylene at 25°C (XCS), having an intrinsic viscosity of 2.85 to 4.00 dl/g, determined according to DIN EN ISO 1628-1 and -3 and being composed of propylene monomer units in an amount of 70 wt% to 90 wt%, with optimum balance of impact resistance and low amount of hexane extractables; a process for their preparation and their use. |
