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    • 7. 发明公开
    • PROPYLENE RESIN COMPOSITION FOR RETORT POUCH-PACKAGING FILM
    • 丙烯酸乙酯ÜUNGÜR M M M M M M M M M M M M M M
    • EP2905309A1
    • 2015-08-12
    • EP13843499.8
    • 2013-10-02
    • Basell Poliolefine Italia S.r.l.
    • KAWAHARADA, HiroshiNAKAJIMA, TakeshiMITO, TakatoshiKAMIMURA, AkihiroAOYAMA, Ryuji
    • C08L23/10C08F297/08
    • C08F297/08C08L23/12C08L23/14C08L2203/162C08L2205/02C08L2205/22C08L2308/00C08L2314/02C09J123/12Y02P20/52C08L23/16
    • An object of the present invention is to provide a propylene resin composition having high processability to stably produce films, and a sealant film for retort pouch-packaging films prepared with the propylene resin composition and having high seal strength. The object is achieved by a propylene resin composition, comprising: a propylene homopolymer, and a propylene-ethylene copolymer dispersed in the propylene homopolymer, the propylene resin composition being prepared through polymerization of propylene and ethylene in the presence of a catalyst comprising:
      (A) a solid catalyst containing, as essential components, magnesium, titanium, halogen, and an electron donor selected from succinate type compounds,
      (B) an organoaluminum compound; and
      (C) an external electron donor selected from silicon compounds, wherein the propylene resin composition contains 25 to 35 wt% ethylene-propylene copolymer,
      the copolymer contains 60 wt% or more propylene,
      the propylene resin composition contains a xylene-soluble content having an intrinsic viscosity [η] of 1.8 to 3.2 dl/g, and
      the propylene resin composition has a melt flow rate of 2.0 to 5.0 g/10 min.
    • 本发明的目的是提供一种能够稳定地生产膜的加工性高的丙烯树脂组合物,以及用丙烯树脂组合物制备并具有高密封强度的蒸煮袋包装膜的密封膜。 该目的通过丙烯均聚物和分散在丙烯均聚物中的丙烯 - 乙烯共聚物的丙烯树脂组合物来实现,该丙烯树脂组合物是通过丙烯和乙烯在催化剂的存在下聚合制备的,该催化剂包含:(A )含有作为必要成分的镁,钛,卤素和选自琥珀酸盐型化合物的电子给体的固体催化剂,(B)有机铝化合物; 和(C)选自硅化合物的外部电子给体,其中所述丙烯树脂组合物含有25〜35重量%的乙烯 - 丙烯共聚物,所述共聚物含有60重量%以上的丙烯,所述丙烯树脂组合物含有二甲苯可溶成分含有 特性粘度[·]为1.8〜3.2dl / g,丙烯树脂组合物的熔体流动速率为2.0〜5.0g / 10分钟。