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    • 1. 发明申请
    • TWO-STEP POLYMERIZATION PROCESS
    • 两步聚合方法
    • WO2003037941A1
    • 2003-05-08
    • PCT/GB2002/004934
    • 2002-10-31
    • BOREALIS TECHNOLOGY OYCAMPBELL, NeilKALLIO, KalleKINNUNEN, EsaLEHTINEN, ArjaMALMBERG, AnneliORA, Marja
    • KALLIO, KalleKINNUNEN, EsaLEHTINEN, ArjaMALMBERG, AnneliORA, Marja
    • C08F210/16
    • C08F210/16C08F110/02C08F2/14C08F2/001C08F2500/01C08F2500/09C08F210/14C08F2500/12C08F2500/05C08F210/08
    • A process for the preparation of homo or copolymers of ethylene, said process comprising: i) in a first polymerisation stage, continuously polymerising ethylene and optionally at least one C 3-10 α-olefin, the reaction mixture further comprising a diluent and a metallocene catalyst having at least one optionally substituted indenyl ligand, said first polymerisation stage being effected essentially in the absence of hydrogen and with an ethylene concentration of 0.005 to 25 % mol relative to said diluent, preferably 0.005 to 4 % mol to a yield a polymer slurry; ii) in a second polymerisation stage continuously polymerising the polymer slurry resulting from said first polymerisation stage with the addition of further ethylene and optionally at least one C 3-10 α-olefin and optionally hydrogen; wherein the first and second polymerisation stages are so effected that the ratio of the weight of polymer produced in the first polymerisation stage to the weight of polymer produced in the second polymerisation stage is 0.1:99.9 to 20:80, that the polymer produced in the first polymerisation stage has long chain branches and that essentially no further long chain branches are formed during the second polymerisation stage.
    • 一种制备乙烯均聚物或共聚物的方法,所述方法包括:i)在第一聚合阶段,连续聚合乙烯和任选的至少一种C 3-10α-烯烃,所述反应混合物还包含稀释剂和茂金属催化剂 具有至少一个任选取代的茚基配体,所述第一聚合阶段基本上在不存在氢气的情况下进行,相对于所述稀释剂,乙烯浓度为0.005至25摩尔%,优选0.005至4摩尔%,以获得聚合物浆料; ii)在第二聚合阶段中,通过加入另外的乙烯和任选的至少一种C 3-10α-烯烃和任选的氢连续聚合由所述第一聚合阶段产生的聚合物浆料; 其中所述第一和第二聚合阶段的影响使得在第一聚合阶段中产生的聚合物的重量与在第二聚合阶段中产生的聚合物的重量之比为0.1:99.9至20:80, 第一聚合阶段具有长链分支,并且在第二聚合阶段基本上不形成另外的长链分支。