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    • 5. 发明申请
    • POLYPROPYLENE FOR FOAM AND POLYPROPYLENE FOAM
    • 聚丙烯泡沫和聚丙烯泡沫
    • WO2012150019A1
    • 2012-11-08
    • PCT/EP2012/001806
    • 2012-04-26
    • BOREALIS AGTRAN, Anh TuanKLIMKE, KatjaBRAUN, HermannFILIPE, Susana
    • TRAN, Anh TuanKLIMKE, KatjaBRAUN, HermannFILIPE, Susana
    • B32B5/18C08F10/06C08F255/02
    • C08F10/06C08F4/34C08F4/65912C08F110/06C08F210/06C08F255/02C08L23/12C08L2203/14C08L2314/06C08F2500/11C08F2500/12C08F236/06C08L47/00
    • The present invention is concerned with a polypropylene composition comprising a polypropylene base resin, the polypropylene composition having - a XHU content of less than 1.25 wt.-%; - a F30 melt strength of at least 30 cN, determined in the Rheotens test at 200°C; and - a melt extensibility v30 of at least 200 m/s, determined in the Rheotens test at 200°C. In another aspect the present invention is concerned with a polypropylene composition having an MFR (2.16 kg, 230 °C, ISO 1133) of 1.0 to 5.0 g/10 min comprising a polypropylene base resin, the polypropylene base resin being obtainable by producing an intermediate polypropylene having an MFR (2.16 kg, 230 °C, ISO 1133) of 0.5 to 2.5 g/10 min in the presence of an asymmetric catalyst; mixing the intermediate polypropylene with peroxide and at least one diene at a temperature of 20 to 90 °C for at least 2 minutes to form a pre-mixed material; melt mixing the pre-mixed material in a melt mixing device at a barrel temperature in the range of 180 to 300 °C, whereby the melt mixing device is a melt mixing device includes a feed zone, a kneading zone and a die zone, whereby an initial barrel temperature T1 is maintained in the feed zone, a barrel temperature T2 is maintained in the kneading zone and a die barrel temperature T3 is maintained in the die zone, whereby the barrel temperatures T1, T2, and T3 satisfy the following relation: T1
    • 本发明涉及包含聚丙烯基础树脂的聚丙烯组合物,所述聚丙烯组合物具有小于1.25重量%的XHU含量; - 在200℃的Rheotens试验中测定的至少30cN的F30熔体强度; 和 - 在200℃下在Rheotens试验中确定的至少200m / s的熔体延展性v30。 另一方面,本发明涉及包含聚丙烯基础树脂的MFR(2.16kg,230℃,ISO 1133)为1.0-5.0g / 10min的聚丙烯组合物,所述聚丙烯基础树脂可通过制备中间体 在不对称催化剂存在下,MFR(2.16kg,230℃,ISO 1133)为0.5〜2.5g / 10min的聚丙烯; 将中间体聚丙烯与过氧化物和至少一种二烯在20至90℃的温度下混合至少2分钟以形成预混合材料; 在熔融混合装置中在180至300℃的机筒温度下将预混合材料熔融混合,由此熔融混合装置是包括进料区,捏合区和模区的熔融混合装置,由此 在进料区中保持初始桶温T1,在捏合区中维持桶温T2,并在模区内维持模筒温度T3,从而桶温T1,T2和T3满足以下关系: T1