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    • 1. 发明申请
    • Process for increasing ethylene incorporation into random copolymers
    • 增加乙烯掺入无规共聚物的方法
    • US20060247394A1
    • 2006-11-02
    • US11117872
    • 2005-04-29
    • William GauthierJun TianShady HenryNathan Williams
    • William GauthierJun TianShady HenryNathan Williams
    • C08F2/00
    • C08F210/16C08F4/65912C08F4/65916C08F10/00C08F210/06C08F4/65927C08F2500/03C08F2500/20
    • Random copolymers may be prepared using a process that includes polymerizing a mixture of monomers including at least propylene and ethylene monomer, in the presence of a catalyst system including a metallocene catalyst having the general structure: racemic-X(2-R1-4-R2-Ind)2MCl2 wherein M is a Group 4, 5 or 6 transition metal, or a lanthanide or actinide series metal; X is a structural bridge imparting stereorigidity; R1 is hydrogen or an alkyl, aryl or a substitution moiety; R2 is hydrogen, or a C1-C4 alkyl; and Ind is an indenyl group. The copolymers are prepared under reaction conditions suitable to form a copolymer, wherein the copolymer has a higher level of ethylene incorporation than a corresponding polymer formed under otherwise identical reaction conditions except that a different bisindeny metallocene catalyst having a 4-indenyl substitution larger than 4 carbons is used. The copolymers may have a lower melt temperature than the corresponding polymers. The resulting copolymers may be used to prepare articles of manufacture including, but not limited to films, fibers and injection molded articles.
    • 无规共聚物可以使用包括聚合包含至少丙烯和乙烯单体的单体的混合物在内的方法在包括具有以下通式结构的茂金属催化剂的催化剂体系存在下的方法来制备: 线式“end =”lead“?>外消旋-X(2-R 1 - 4-R 2 -Ind)2 MCl 其中M是第4,5或6族过渡金属,或镧系元素或锕系元素系列金属 ; X是赋予立体感的结构桥梁; R1是氢或烷基,芳基或取代部分; R 2是氢或C 1 -C 4烷基; 而Ind是茚基。 共聚物在适于形成共聚物的反应条件下制备,其中共聚物具有比在其他相同反应条件下形成的相应聚合物更高的乙烯掺入水平,不同之处在于使用具有4-茚基取代基大于4个碳原子的不同的双茚基茂金属催化剂 用来。 共聚物可以具有比相应聚合物更低的熔融温度。 所得共聚物可用于制备制品,包括但不限于薄膜,纤维和注模制品。