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    PROPYLENE HOMOPOLYMER HAVING HIGH MELT STRENGTH AND PREPARATION METHOD THEREOF
    2.
    发明公开
    PROPYLENE HOMOPOLYMER HAVING HIGH MELT STRENGTH AND PREPARATION METHOD THEREOF 有权
    HERSTELLUNGSVERFAHRENFÜRPROPYLEN-HOMOPOLYMER MIT HOHER SCHMELZFESTIGKEIT

    公开(公告)号：EP2527376A1

    公开(公告)日：2012-11-28

    申请号：EP11734336.8

    申请日：2011-01-21

    申请人： China Petroleum & Chemical Corporation ,  Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

    发明人： SONG, Wenbo ,  GUO, Meifang ,  ZHANG, Shijun ,  WEI, Wenjun ,  HUANG, Honghong ,  YU, Luqiang ,  LIU, Tao ,  HU, Huijie ,  XU, Huan ,  YU, Peiqian ,  ZHANG, Xiaomeng

    IPC分类号： C08F10/06 ,  C08F2/38

    CPC分类号： C08F110/06 ,  C08F2/001 ,  C08F2500/01 ,  C08F2500/04 ,  C08F2500/11 ,  C08F2500/12 ,  C08F4/6465 ,  C08F4/6492

    摘要： The present invention provides a process for preparing high melt strength propylene polymer by direct polymerization, comprising that a propylene polymer with wide molecular weight distribution and containing "very high molecular weight fraction" can be prepared by controlling the species and ratios of the external electron donors in the Ziegler-Natta catalyst system at different reaction stages according to the requirment for different molecular weight fractions in the different propylene polymerization stage of the series operation, and said polymer has excellent mechnical properties, especially with very high melt strength. The present invention also provides a propylene homopolymer with high melt strength, comprising the following features: (1) the MFR is 0.2-10g/10min at 230°C with a load of 2.16kg; (2) the molecular weight distribution M w /M n is 6-20; (3) the content of the fraction with a molecular weight higher than 5,000,000 is higher than or equal to 0.8wt%; (4) M z+1 /M n is higher than or equal to 70. Said homopolymer can be used in the preparation of foam products, thermoforming products, biaxial stretching films, blown films and blow-molded products.

    摘要翻译： 本发明提供了一种通过直接聚合制备高熔体强度丙烯聚合物的方法，其包括具有宽分子量分布并含有“非常高分子量级分”的丙烯聚合物可以通过控制外部电子给体的种类和比例 在不同反应阶段的齐格勒 - 纳塔催化剂体系中，根据不同分子量级分在不同的丙烯聚合反应阶段的要求，所述聚合物具有优异的机械性能，特别是具有非常高的熔体强度。 本发明还提供了具有高熔体强度的丙烯均聚物，其特征在于：（1）在230℃，2.16kg载荷下，MFR为0.2-10g / 10min; （2）分子量分布M w / M n为6〜20; （3）分子量高于5,000,000的级分的含量高于或等于0.8wt％; （4）M z + 1 / M n高于或等于70.所述均聚物可用于制备泡沫产品，热成型产品，双轴拉伸膜，吹塑薄膜和吹塑产品。