申请人:Satoh Yasuo
公开号:US20060135712A1
公开(公告)日:2006-06-22
An ethylene-based polymer which is an ethylene/C4 to C10 α-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 1.0 to 50 g/10 minutes; [k2] LNR defined as a scale of neck-in upon film molding is in the range of 0.6 to 1.4; and [k3] take-up speed at break [DS (m/min)] at 160° C. and melt flow rate (MFR) satisfy the following relationship (Eq-1): 12×MFR
0.577
≦DS≦165×MFR
0.577
(Eq-1), and a thermoplastic resin composition containing the ethylene-based polymer, provide a molded product, preferably a film, excellent in moldability and mechanical strength. The ethylene-based polymer can be efficiently obtained by polymerization in the presence of an olefin polymerization catalyst formed from a solid carrier, (A) a solid transition metal catalyst component obtained by contacting (a) a compound of a transition metal of the group 4 in the periodic table, containing at least one ligand having a cyclopentadienyl skeleton, (b) an organoaluminum oxy compound, (c) a multifunctional organic halide, and if necessary (d) an organoaluminum compound, and if necessary (B) organoaluminum compound.
一种乙烯基聚合物,它是一种乙烯/C4 至 C10 α-烯烃共聚物,并满足以下[k1]至[k3]的要求:[k1] 熔体流动速率(MFR)在 190 摄氏度、负载 2.16 千克的条件下,范围在 1.0 至 50 克/10 分钟之间;[k2] LNR 定义为薄膜成型时的缩颈比例,范围在 0.6 至 1.4 之间;以及 [k3] 160 摄氏度时的断裂收口速度[DS(米/分)]和熔体流动速率(MFR)满足以下关系式(公式-1):12×MFR
0.577
≦DS≦165×MFR
0.577
(式-1),以及含有乙烯基聚合物的热塑性树脂组合物,可提供模塑产品,最好是薄膜,具有优异的模塑性和机械强度。乙烯基聚合物可通过在由固体载体、(A)固体过渡金属催化剂组分、(B)有机铝氧化合物、(C)多功能有机卤化物和必要时(D)有机铝化合物以及必要时(B)有机铝化合物形成的烯烃聚合催化剂存在下进行聚合而有效地获得。