| 摘要 |
Heterophasic propylene copolymer comprising
a) a propylene homo- or copolymer matrix with an MFR 2 of ‰¥ 150 g/10 min according to ISO 1133 (230°C, 2.16 kg load) and
b) a trimodal elastomeric propylene copolymer dispersed in said matrix,
wherein
(i) the xylene cold soluble fraction of the heterophasic propylene copolymer at room temperature is present in an amount of 20 to 80 wt% of the of the heterophasic propylene copolymer,
(ii) the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity measured according to ISO 1628-1 (at 135°C in tetraline) of at least 2.5 dl/g
(iii) said of the heterophasic propylene copolymer has a flexural modulus lower than 800 MPa according to ISO 178, a melting temperature measured by DSC from 155 to 170°C and a total ethylene content from 10 to 35 wt%; and a process for its production.
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