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    NUCLEATED PROPYLENE POLYMER COMPOSITION
    2.
    发明公开
    NUCLEATED PROPYLENE POLYMER COMPOSITION 审中-公开

    公开(公告)号：EP3526286A1

    公开(公告)日：2019-08-21

    申请号：EP17783437.1

    申请日：2017-10-05

    申请人： Basell Poliolefine Italia S.r.l.

    发明人： MASSARI, Paola ,  FELISATI, Andrea ,  IZZI, Marco ,  CAVALIERI, Claudio ,  CIARAFONI, Marco ,  GUERRA, Silvia ,  PANTALEONI, Roberto ,  MALIZIA, Federica

    IPC分类号： C08L23/12

    摘要： A nucleated propylene polymer composition comprising: A) from 77 wt% to 91 wt%, of a propylene homopolymer having a fraction insoluble in xylene at 25 °C higher than 95 %; B) from 9 wt % to 23 wt%, of a copolymer of propylene with from 28.0 wt% to 42.0 wt% of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25 °C comprised between 1.0 dl/g and 1.9 dl/g, a fraction soluble in xylene at 25 °C comprised between 9.0 wt% and 21.0 wt%, a total melt flow rate (Melt Flow Rate according to ISO 1133, condition L, i.e. 230°C and 2.16 kg load) comprised between 1.5 and 5 g/10 min and the value of the relation (I): 22.5+0.2*MFR-1.2*Xs+0.2*IV is higher than 5.9; wherein MFR is the melt flow rate of the nucleated composition (Melt Flow Rate according to ISO 1133, condition L, i.e. 230°C and 2.16 kg load); IV is the intrinsic viscosity of the fraction soluble in xylene at 25 °C; and Xs is the fraction soluble in xylene at 25°C; wherein the amount of A+B is equal to 100 wt% and wherein the nucleated agent is selected from the group consisting of aromatic or aliphatic carboxylic acids, aromatic metal phosphates, sorbitol derivatives and talc.