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    • 6. 发明授权
    • Process for preparing ethylene copolymers
    • 制备乙烯共聚物的方法
    • US5502125A
    • 1996-03-26
    • US401975
    • 1995-03-10
    • Radu BordeianuChristoph Theis
    • Radu BordeianuChristoph Theis
    • C08F210/02C08F2/04C08F2/06C08F4/60C08F4/639C08F4/68C08F10/00C08F210/00C08F210/18C08F4/685
    • C08F10/00
    • An olefin copolymer is prepared by copolymerizing ethylene, an .alpha.-olefin and, optionally a diene having non-conjugated double bonds by solution polymerization in the presence of:(a) an organoaluminum compound,(b) a vanadium compound in the oxidation state from +3 to +5, and(c) an activator in a molar ratio of from 0.5 to 100 relative to vanadium of said vanadium compound, and an activator of a 2-halomalonic ester substituted by an aromatic group and having the formula ##STR1## wherein X=F, Cl, Br or I, Ar is an aromatic radical which is unsubstituted, monosubstituted or polysubstituted by alkyl or alkoxy groups and which is bound to the central carbon atom either directly or by an intervening carbonyl group; and R.sub.1 and R.sub.2 are hydrocarbon radicals having from 1 to 20 carbon atoms.
    • 烯烃共聚物通过在以下存在下共聚合乙烯,α-烯烃和任选具有非共轭双键的二烯:(a)有机铝化合物,(b)氧化态的钒化合物, +3至+5,和(c)相对于所述钒化合物的钒,摩尔比为0.5至100的活化剂和由芳基取代的具有下式的化合物的2-卤代马来酸酯的活化剂: 其中X = F,Cl,Br或I,Ar是未被取代的,被烷基或烷氧基单取代或多取代并且直接或通过中间羰基结合到中心碳原子上的芳族基团; 并且R 1和R 2是具有1至20个碳原子的烃基。