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发明公开
CN103547443A 用于泡沫体的聚丙烯和聚丙烯泡沫体 有权

用于泡沫体的聚丙烯和聚丙烯泡沫体
摘要：
本发明涉及一种包括聚丙烯基础树脂的聚丙烯组合物，所述聚丙烯组合物具有低于1.25wt%的XHU含量；在200℃下Rheotens测试中测定的至少30cN的F30熔体强度；以及在200℃下Rheotens测试中测定的至少200m/s的熔体延伸性v30。另一方面，本发明涉及一种包括聚丙烯基础树脂的聚丙烯组合物，其具有1.0-5.0g/10min的MFR（2.16kg，230℃，ISO1133），所述聚丙烯基础树脂可通过如下步骤获得：在不对称催化剂的存在下生产具有0.5-2.5g/10min的MFR（2.16kg，230℃，ISO1133）的中间体聚丙烯；在20至90℃的温度下将所述中间体聚丙烯与过氧化物和至少一种二烯混合至少2分钟以形成预混合物料；在熔融混合装置中在180至300℃的范围内的机筒温度下熔融混合所述预混合物料，其中所述熔融混合装置为包括进料区、捏合区和模具区的熔融混合装置，其中在所述进料区维持起始机筒温度T1，在所述捏合区维持机筒温度T2，并且在所述模具区维持模具机筒温度T3，且所述机筒温度T1、T2和T3满足下列关系：T1
摘要（英）：

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 DEG C; and - a melt extensibility v30 of at least 200 m/s, determined in the Rheotens test at 200 DEG C. In another aspect the present invention is concerned with a polypropylene composition having an MFR (2.16 kg, 230 DEG 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 DEG 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 DEG 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 DEG 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 < T3 < T2.

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