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    • 2. 发明申请
    • BIMETALLIC CATALYST, METHOD OF POLYMERIZATION AND BIMODAL POLYOLEFINS THEREFROM
    • 双金属催化剂,聚合方法及其双峰聚烯烃
    • WO2004060864A3
    • 2004-08-19
    • PCT/US0333473
    • 2003-10-21
    • UNIVATION TECH LLC
    • KAO SUN-CHUEHAWE MICHAEL D
    • C08F4/02C08F4/60C08F4/659C08F4/6592C08F10/00C08F110/02B01J31/00B01J37/00
    • C08F10/00C08F4/65908C08F4/65916C08F4/65925C08F110/02C08F4/65904C08F4/6555C08F2500/05C08F2500/07
    • Bimetallic catalysts, and methods of producing a bimetallic catalyst comprising a modified Ziegler-Natta catalyst and a metallocene are provided, in one embodiment the method including combining: (a) a Ziegler-Natta cataylst comprising a Group 4, 5 or 6 metal halide and/or oxide, optionally including a magnesium compound, with (b) a modifier compound ("modifier"), wherein the modifier compound is a Group 13 alkyl compound, to form a modified Ziegler-Natta catalyst. Also provided is a method of olefin polymerization using the bimetallic catalyst of the invention. The modified Ziegler-Natta catalyst is preferably non-activated, that is, it is unreactive towards olefin polymerization alone. In one embodiment, the molar ratio of the Group 13 metal (of the modifier) to the Group 4, 5 or 6 metal halide and/or oxide is less than 10:1 in one embodiment. The bimetallic catalyst of the present invention are useful in producing bimodal polymers, particularly bimodal polyethylene, having a Polydispersity (Mw/Mn) of from 12 to 50. These bimodal polyolefins are useful in such articles as pipes and films.
    • 提供了双金属催化剂和生产包含改性的齐格勒 - 纳塔催化剂和茂金属的双金属催化剂的方法,在一个实施方案中,该方法包括将(a)包含4,5或6族金属卤化物的齐格勒 - 纳塔催化剂和 (b)改性剂化合物(“改性剂”),其中改性剂化合物为第13族烷基化合物,以形成改性的齐格勒 - 纳塔催化剂。 还提供了使用本发明的双金属催化剂的烯烃聚合方法。 改性的齐格勒 - 纳塔催化剂优选是未活化的,即它对单独的烯烃聚合反应不活泼。 在一个实施方案中,在一个实施方案中,(改性剂的)第13族金属与第4,5或6族金属卤化物和/或氧化物的摩尔比小于10:1。 本发明的双金属催化剂可用于制备多分散性(Mw / Mn)为12至50的双峰聚合物,特别是双峰聚乙烯。这些双峰聚烯烃可用于管道和膜等制品中。