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    • 1. 发明授权
    • Prepolymerization catalyst for use in gas phase polymerization of olefins and process for producing the same
    • 用于烯烃气相聚合的预聚合催化剂及其制备方法
    • US06645901B2
    • 2003-11-11
    • US09820977
    • 2001-03-30
    • Tomoaki GotoKazuki WakamatsuShinichi Kumamoto
    • Tomoaki GotoKazuki WakamatsuShinichi Kumamoto
    • B01J3100
    • C08F10/00C08F210/16Y10S526/901Y10S526/908Y10S526/909C08F4/6565C08F4/6492C08F210/08C08F2500/18C08F2500/12C08F2500/17
    • A prepolymerization catalyst for use in a gas phase polymerization of an olefin or combinations of olefins which comprises (A) a solid catalyst component comprising magnesium, halogen, titanium and an electron donor and having a weight-average particle diameter of 15 to 45 &mgr;m, (B) at least one organoaluminum compound and (C) a prepolymer of an ethylene and/or at least one &agr;-olefin, wherein the molar ratio of aluminum to titanium in the prepolymerization catalyst (Al/Ti ratio) is 3 to 11 (mol/mol), the weight ratio of the prepolymerization catalyst to the solid catalyst component (prepolymerization catalyst/solid catalyst component) is 2 to 35 (g/g), the content of volatile materials (VM) in the prepolymerization catalyst is 2.0% by weight or less, and the intrinsic viscosity [&eegr;] measured in tetralin at 135° C. is 2.0 dl/g or less, and a process for a production thereof. According to the present invention, a prepolymerization catalyst for gas phase polymerization of olefins showing a high activity in gas phase polymerization, not forming aggregates and coarse particles markedly at the time of prepolymerization, having a high bulk density and an excellent fluidity, not causing a marked entraining of prepolymerization catalyst and product powder out of the fluidized bed and nearly completely free from a formation of aggregates, at the time of gas phase polymerization, and giving an olefin polymer having a low content of cold xylene-soluble fraction can be provided.
    • 一种用于烯烃或烯烃组合的气相聚合的预聚合催化剂,其包含(A)包含镁,卤素,钛和电子给体的固体催化剂组分,其重均粒径为15至45μm, (B)至少一种有机铝化合物和(C)乙烯和/或至少一种α-烯烃的预聚物,其中预聚合催化剂中铝与钛的摩尔比(Al / Ti比)为3-11( mol / mol),预聚合催化剂与固体催化剂组分(预聚合催化剂/固体催化剂组分)的重量比为2〜35(g / g),预聚合催化剂中挥发物(VM)的含量为2.0% 以下,在135℃下在四氢化萘中测定的特性粘度η为2.0dl / g以下,以及其制造方法。根据本发明,提供了一种气相聚合用预聚合催化剂 烯烃聚合物 在气相聚合中具有高活性,在预聚合时不显着形成聚集体和粗颗粒,具有高堆积密度和优异的流动性,不会引起预聚合催化剂和产物粉末明显夹带在流化床之外,几乎 在气相聚合时完全没有聚集体的形成,并且可以提供具有低二甲苯可溶成分含量低的烯烃聚合物。
    • 2. 发明申请
    • PROPYLENE-ETHYLENE-BUTENE BLOCK COPOLYMER AND MOLDED ARTICLE THEREOF
    • 丙烯 - 乙烯 - 嵌段共聚物及其成型品
    • US20100197865A1
    • 2010-08-05
    • US12064647
    • 2006-08-29
    • Hideki OshimaTakashi SanadaKazuki Wakamatsu
    • Hideki OshimaTakashi SanadaKazuki Wakamatsu
    • C08F255/04
    • C08F297/08C08F297/083C08L23/12C08L53/00C08L2666/06
    • A propylene-ethylene-butene block copolymer is provided which includes from 60 to 85% by weight of a polypropylene portion and from 15 to 40% by weight of a propylene-ethylene-butene random copolymer portion, wherein the copolymer satisfies the requirements (1) and (2) given below. In addition, a molded article including such a propylene-ethylene-butene block copolymer is provided. (1) The random copolymer portion includes a propylene-ethylene random copolymer component (EP) and a propylene-ethylene-butene random copolymer component (EPB) and the copolymer component (EP) has an intrinsic viscosity of from 1.5 to 8 dl/g and an ethylene unit content of from 20 to 50% by weight, and the copolymer component (EPB) has an intrinsic viscosity of from 0.5 to 8 dl/g, an ethylene unit content of from 47 to 77% by weight and a butene unit component of from 3 to 33% by weight and the total of the ethylene unit content and the butene unit content is from 50 to 80% by weight. (2): The propylene-ethylene-butene block copolymer has a melt flow rate of from 5 to 120 g/10 min.
    • 提供了丙烯 - 乙烯 - 丁烯嵌段共聚物,其包含60至85重量%的聚丙烯部分和15至40重量%的丙烯 - 乙烯 - 丁烯无规共聚物部分,其中所述共聚物满足要求(1 )和(2)给出。 此外,提供了包含这种丙烯 - 乙烯 - 丁烯嵌段共聚物的模塑制品。 (1)无规共聚物部分包括丙烯 - 乙烯无规共聚物组分(EP)和丙烯 - 乙烯 - 丁烯无规共聚物组分(EPB),共聚物组分(EP)的特性粘度为1.5至8dl / g 乙烯单元含量为20〜50重量%,共聚物成分(EPB)的特性粘度为0.5〜8dl / g,乙烯单元含量为47〜77重量%,丁烯单元 组分为3至33重量%,乙烯单元含量和丁烯单元含量的总和为50至80重量%。 (2):丙烯 - 乙烯 - 丁烯嵌段共聚物的熔体流动速率为5〜120g / 10分钟。
    • 8. 发明授权
    • Process for producing propylene-ethylene block copolymers
    • 制备丙烯 - 乙烯嵌段共聚物的方法
    • US4254237A
    • 1981-03-03
    • US30523
    • 1979-04-16
    • Akinobu ShigaMasahiro KakugoHajime SadatoshiKazuki WakamatsuHiroshi Yoshioka
    • Akinobu ShigaMasahiro KakugoHajime SadatoshiKazuki WakamatsuHiroshi Yoshioka
    • C08F297/00C08F297/08
    • C08F297/086
    • A process for producing propylene-ethylene block copolymers by a three-step polymerization technique using a stereoregular catalyst, characterized in that the first-step polymerization is carried out by supplying propylene alone or a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 6/94 or less, thereby polymerizing 60 to 95% by weight of the total polymerization amount, the second-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 15/85 to 79/21, thereby polymerizing 1 to 20% by weight of the total polymerization amount, and the third-step polymerization is carried out by supplying a propylene/ethylene mixture so that the ethylene/propylene reaction ratio is 50/50 to 89/11, thereby polymerizing 4 to 35% by weight of the total polymerization amount, with the ethylene/propylene reaction ratio in the third step made larger than that in the second step. Said process can give propylene-ethylene block copolymers markedly well balanced in impact strength, stiffness, transparency and impact blushing.
    • 一种通过使用立体规则催化剂的三步聚合技术制备丙烯 - 乙烯嵌段共聚物的方法,其特征在于第一步聚合是通过仅供应丙烯或丙烯/乙烯混合物进行的,以使乙烯/丙烯反应比 为6/94以下,由此聚合60〜95重量%的总聚合量,第二步聚合是通过供给丙烯/乙烯混合物进行的,以使乙烯/丙烯反应比为15/85〜79 / 21,由此聚合1至20重量%的总聚合量,第三步聚合通过供应丙烯/乙烯混合物进行,使得乙烯/丙烯反应比为50/50至89/11, 从而聚合4〜35重量%的总聚合量,第3步骤中的乙烯/丙烯反应比例大于第2步骤。 所述方法可以使丙烯 - 乙烯嵌段共聚物在冲击强度,刚度,透明度和冲击冲刷中显着地平衡。