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    • 6. 发明申请
    • USE OF AN IMPROVED SOLID VANADIUM-CONTAINING ZIEGLER-NATTA CATALYST SYSTEM FOR PRODUCING ETHYLENE POLYMER COMPOSITIONS IN A MULTISTAGE PROCESS
    • 在多级过程中使用用于生产乙烯聚合物组合物的改进的含固体含钒纳米粒子催化剂体系
    • WO2009087036A1
    • 2009-07-16
    • PCT/EP2008/067821
    • 2008-12-18
    • Borealis Technology OYGAROFF, ThomasWALDVOGEL, PäiviKALLIO, Kalle
    • GAROFF, ThomasWALDVOGEL, PäiviKALLIO, Kalle
    • C08F210/16C08F4/685C08F2/00C08F297/08C08J5/18F16L9/12
    • C08F210/16C08F110/02C08F4/685C08F2/001C08F210/14C08F2500/12C08F2500/18C08F2500/05C08F2500/26C08F2500/20
    • Improved method for tailoring the molecular weight distribution and comonomer incorporation of a multimodal ethylene polymer having a lower molecular weight component and a higher molecular weight component comprising polymerizing ethylene and optionally at least one further alpha-olefin in at least two stages, wherein at least one stage is carried out in a slurry phase in the presence of an improved solid Ziegler-Natta catalyst system, said catalyst system comprising 1) a solid procatalyst formed by contacting at least: a) a Mg-alcoholate complex of the formula (I): Mg(OR 1 ) 2-n (R 1 ) n , wherein each R 1 independently represents a C 1 -C 20 hydrocarbyl group; and 0 ≤ n 2 ) m X 3-m , wherein each R 2 independently represents an alkyl of up to 6 carbon atoms; each X is independently a halogen; 0 ≤ m 1 -C 20 -alkyl group, 0 ≤ x ≤ 2; 1 ≤ y ≤ 3; 0 ≤ z ≤ 2 and x + y + z = 3, x, y and z may or may not be an integer; a polymer obtainable by this method and use of such a polymer for the manufacture of pipes and films.
    • 用于定制具有较低分子量组分和较高分子量组分的多峰乙烯聚合物的分子量分布和共聚单体掺入的改进方法,包括在至少两个阶段聚合乙烯和任选的至少一种其它α-烯烃,其中至少一个 在改进的固体齐格勒 - 纳塔催化剂体系的存在下,在淤浆相中进行阶段,所述催化剂体系包含1)通过使至少与下列物质接触而形成的固体前催化剂:a)式(I)的Mg-醇合物络合物: Mg(OR1)2-n(R1)n,其中每个R1独立地表示C1-C20烃基; 和0 = n 2)mX 3-m,其中每个R 2独立地表示至多6个碳原子的烷基; 每个X独立地是卤素; 0 = m <3和m,并且可以是或不是整数c)钒化合物和钛化合物,以提供V:Ti的摩尔比为99:1至1:99,以及d)任选的一个 或更多的有机配体化合物,其选自包含环戊二烯基阴离子主链的有机化合物,以产生固体前催化剂和2)式(III)的一种或多种有机金属助催化剂,其中每个R为 独立地为C 1 -C 20烷基,0 = x = 2; 1 = y = 3; 0 = z = 2,x + y + z = 3,x,y和z可以是整数; 可通过该方法获得的聚合物和这种聚合物用于制造管和膜的用途。