Random propylene copolymer with high stiffness and low haze

摘要

Propylene copolymer (R-PP) comprising a propylene copolymer fraction (C-A) and a propylene copolymer fraction (B) in the weight ratio [(C-A)/(B)] of 30/70 to 70/30, wherein said propylene copolymer (R-PP) has
(a) a comonomer content in the range of equal or more than 1.5 to equal or below 8.0 wt.-%, the comonomers are ethylene and /or C 4 to C 12 ±-olefins, and
(b) a melt flow rate MFR 2 (230 °C) measured according to ISO 1133 of equal or more than 65 to equal or below 200 g/10min,
wherein further
(c) said propylene copolymer fraction (C-A) has a comonomer content in the range of equal or more than 0.5 to equal or below 3.0 wt.-%, the comonomers are ethylene and /or C 4 to C 12 ±-olefin s , and
(d) said propylene copolymer fraction (B) has a comonomer content in the range of equal or more than 2.5 to equal or below 10.0 wt.-%, the comonomers are ethylene and /or C 4 to C 12 ±-olefins.