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    • 32. 发明授权
    • Asymmetric ethylene-bridged metallocenes useful as catalysts in the
polymerization of olefins and process for preparing said metallocenes
    • 用作烯烃聚合中的催化剂的不对称乙烯桥连金属茂和制备所述金属茂的方法
    • US6100416A
    • 2000-08-08
    • US87981
    • 1998-06-01
    • Marvin D. RauschEmma J. ThomasSerge BettonvilleDidier Grandfils
    • Marvin D. RauschEmma J. ThomasSerge BettonvilleDidier Grandfils
    • C07F7/00C07F17/00C08F4/64C08F4/659C08F4/6592C08F10/00
    • C07F17/00C08F10/00C08F110/02C08F210/16C08F4/65912Y10S526/943
    • Novel asymmetric ethylene-bridged metallocenes useful as catalysts in the polymerization of olefins and process for preparing said metallocenes.The novel metallocenes are represented by the general formula: ##STR1## wherein M represents a transition metal selected from titanium, zirconium and hafnium and X and X' represent a halogen atom. Preferably, the transition metal is Zr and the halogen atoms are both chlorine.Process for producing the novel metallocenes of general formula (I) comprising the steps of:a) reacting fluorenyllithium with 1,2-dibromoethane to produce 1-(9-fluorenyl)-2-bromoethane,b) reacting the said 1-(9-fluorenyl)-2-bromoethane with 2,4,7-trimethylindenyllithium to produce 1-(9-fluorenyl)-2-[1-(2,4,7-trimethyl)indenyl]ethane precursor,c) reacting the said 1-(9-fluorenyl)-2-[1-(2,4,7-trimethyl)indenyl]ethane precursor with butyllithium to produce its dilithium salt andd) reacting the said dilithium salt with a transition metal halide selected from halides of Ti, Zr and Hf to produce the metallocenes.The novel metallocenes are useful as catalysts for the polymerization of olefins such as ethylene and propylene and, in particular, for the production of higly isotactic polypropylene.
    • 用于烯烃聚合中的催化剂的新型不对称乙烯桥连金属茂和制备所述金属茂的方法。 新型茂金属由通式表示:其中M表示选自钛,锆和铪的过渡金属,X和X'表示卤素原子。 优选地,过渡金属是Zr,并且卤素原子都是氯。 制备通式(I)的新金属茂的方法,包括以下步骤:a)使芴基锂与1,2-二溴乙烷反应,生成1-(9-芴基)-2-溴乙烷,b)使所述1-(9 芴基)-2-溴乙烷与2,4,7-三甲基茚基锂反应,生成1-(9-芴基)-2- [1-(2,4,7-三甲基)茚基]乙烷前体,c)使所述1 - (9-芴基)-2- [1-(2,4,7-三甲基)茚基]乙烷前体与丁基锂反应生成其二锂盐,和d)使所述二锂盐与选自Ti ,Zr和Hf以产生金属茂。 新型金属茂可用作烯烃如乙烯和丙烯的聚合催化剂,特别是用于生产高度全同立构聚丙烯的催化剂。
    • 39. 发明授权
    • Propylene polymers and process for the production thereof
    • 丙烯聚合物及其制备方法
    • US5756587A
    • 1998-05-26
    • US704509
    • 1996-09-12
    • Serge BettonvillePhilippe De RopClaude Franquinet
    • Serge BettonvillePhilippe De RopClaude Franquinet
    • C08F297/08C08F297/06C08L53/00
    • C08F297/06C08L53/00
    • Propylene block copolymer containing per: 100 parts by weight of a polymer (a) of propylene chosen from homopolymers and copolymers of propylene not containing more than 6% by weight of ethylene and/or of an alpha-olefin having from 4 to 6 carbon atoms, from 1 to 100 parts by weight of a polymer (b) of ethylene chosen from homopolymers and copolymers of ethylene not containing more than 90% by weight of propylene and/or of another alpha-olefin having from 4 to 6 carbon atoms, the said block copolymer additionally containing from approximately 0.001 to approximately 20% by weight of .alpha.,.omega.-diene-derived monomer units with respect to the total weight of the block copolymer.
    • PCT No.PCT / EP95 / 00851 Sec。 371日期1996年9月12日 102(e)日期1996年9月12日PCT 1995年3月7日PCT公布。 公开号WO95 / 25137 日期1995年9月21日含有丙烯嵌段共聚物:100重量份丙烯聚合物(a),其选自丙烯的均聚物和共聚物,其不包含大于6重量%的乙烯和/或α-烯烃, 4至6个碳原子,1至100重量份的选自乙烯的均聚物和共聚物的乙烯聚合物(b),所述乙烯不包含大于90重量%的丙烯和/或另外的具有4至6个碳原子的α-烯烃 6个碳原子,所述嵌段共聚物相对于嵌段共聚物的总重量另外含有约0.001至约20重量%的α,ω-二烯衍生的单体单元。