HIGH FLOW HETEROPHASIC PROPYLENE COPOLYMER COMPOSITION HAVING IMPROVED IMPACT PROPERTIES
A heterophasic propylene copolymer composition comprising a heterophasic propylene copolymer (HECO), comprising a matrix (A) comprising a propylene homo- or copolymer, said propylene homo- or copolymer comprises at least two propylene homo- and/or copolymer fractions, propylene homo- or copolymer fr...
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Zusammenfassung: | A heterophasic propylene copolymer composition comprising a heterophasic propylene copolymer (HECO), comprising a matrix (A) comprising a propylene homo- or copolymer, said propylene homo- or copolymer comprises at least two propylene homo- and/or copolymer fractions, propylene homo- or copolymer fraction (A1) and propylene homo- or copolymer fraction (A2), wherein propylene homo- or copolymer fraction (A1) has a melt flow rate MFR2 (230°C) of 250 g/10 min or more, preferably of 300 g/10min or more, more preferably of more than 300 g/10min, and propylene homo- or copolymer fraction (A2) has a melt flow rate MFR2 (230°C) in the range of from 0.5 to 25 g/10 min, preferably in the range of from 1 to 20 g/10min; and an elastomeric propylene copolymer (B), preferably a uni- or bimodal elastomeric propylene copolymer, more preferably a unimodal elastomeric propylene copolymer, dispersed in said matrix (A), wherein the heterophasic propylene copolymer composition has a melt flow rate MFR2 (230°C) of at least 50 g/10 min; the amount of propylene homo- or copolymer fraction (A1) is from 45 wt.% to 95 wt.% based on the total amount of all propylene homo- and/ or copolymer fractions present in the matrix (A); the amount of propylene homo- or copolymer fraction (A2) is from 5 wt.% to less than 15 wt.% based on the total amount of all propylene homo- and/or copolymer fractions present in the matrix (A); and the xylene cold soluble fraction (XCS) of the heterophasic propylene copolymer composition comprises more than 18 wt.% of the total heterophasic propylene copolymer composition (HECO). |
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