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    • 10. 发明申请
    • PROCESS FOR PREPARING ZIEGLER-NATTA PRODUCED POLYETHYLENE BLENDS
    • 制备ZIEGLER-NATTA生产的聚乙烯混合物的方法
    • WO2012119953A1
    • 2012-09-13
    • PCT/EP2012/053654
    • 2012-03-02
    • TOTAL RESEARCH & TECHNOLOGY FELUYDEWACHTER, DaanDAMME, Eric
    • DEWACHTER, DaanDAMME, Eric
    • C08L23/06C08L23/08C08F10/02
    • C08L23/06C08L23/0815C08L2205/025C08L2207/062C08L2308/00C08L2314/02C08L2666/06
    • The invention relates to a process for preparing a multimodal polyethylene product, said product comprising at least two different polyethylene resins, the process comprising the steps of: (a) producing a first HMW polyethylene resin in the presence of a Ziegler-Natta catalyst in a reactor, wherein the High Load Melt Index (HLMI) of said first polyethylene resin is between 0.01 and 5 g/10 min, with the High Load Melt Index (HLMI) being measured by the procedure of ASTM D-1238 using a temperature of 190°C and a load of 21.6 kg; (b) separately producing a second LMW polyethylene resin in the presence of a Ziegler-Natta catalyst in a reactor, wherein the Melt Index (Ml2) of said second polyethylene resin is between 1 and 150 g/10 min, with the Melt Index Ml2 being measured by the procedure of ASTM D-1238 using a temperature of 190°C and a load of 2.16 kg; and (c) physically blending together said first and said second polyethylene resin to produce a multimodal polyethylene product, wherein the Ziegler-Natta catalyst used for the production of said first polyethylene resin has an average particle size (D50) of at most 15 μηι, with the D50 being measured by laser diffraction analysis on a Malvern type analyzer, and wherein step (c) is performed in device for continuously melting and blending said first and second polyethylene resin.
    • 本发明涉及一种制备多峰聚乙烯产品的方法,所述产品包含至少两种不同的聚乙烯树脂,该方法包括以下步骤:(a)在齐格勒 - 纳塔催化剂存在下,在第一种HMW聚乙烯树脂 反应器,其中所述第一聚乙烯树脂的高负荷熔体指数(HLMI)为0.01至5g / 10min,其中通过ASTM D-1238的程序使用190℃的温度测量高负荷熔体指数(HLMI) °C,负荷21.6 kg; (b)在齐格勒 - 纳塔催化剂存在下在反应器中分别生产第二LMW聚乙烯树脂,其中所述第二聚乙烯树脂的熔体指数(M12)为1-150g / 10min,熔体指数M12 通过ASTM D-1238的程序使用190℃的温度和2.16kg的负荷来测量; 和(c)将所述第一和第二聚乙烯树脂物理混合在一起以制备多峰聚乙烯产品,其中用于生产所述第一聚乙烯树脂的齐格勒 - 纳塔催化剂的平均粒径(D50)至多为15微米 α,通过在Malvern型分析仪上的激光衍射分析来测量D50,并且其中步骤(c)在用于连续熔融和共混所述第一和第二聚乙烯树脂的装置中进行。