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    • 6. 发明授权
    • Catalyst composition having improved comonomer reactivity
    • 催化剂组合物具有改善的共聚单体反应性
    • US5756416A
    • 1998-05-26
    • US563702
    • 1995-11-28
    • Eric Paul WassermanSun Chueh KaoFrederick John Karol
    • Eric Paul WassermanSun Chueh KaoFrederick John Karol
    • C08F4/44C08F4/602C08F4/619C08F4/6192C08F4/64C08F4/642C08F4/659C08F4/6592C08F10/00C08F210/02C08F210/16
    • C08F10/00C08F210/16C08F4/61912C08F4/61916C08F4/6192Y10S526/901Y10S526/943
    • A catalyst composition comprising A) an aluminoxane-impregnated support prepared by contacting an aluminoxane with an inert carrier material and heating to a temperature of at least about 80.degree. C.; B) a metallocene of the formula: (L).sub.y (L')MY.sub.(x-y-1) wherein M is a metal from groups IIIB to VIII of the Periodic Table; each L and L' is independently a cycloalkadienyl group bonded to M; each Y is independently hydrogen, an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having 1-20 carbon atoms, a hydrocarboxy radical having from 1-20 carbon atoms, a halogen, RCO.sub.2 --, or R.sub.2 N--, wherein R is a hydrocarbyl group containing 1 to about 20 carbon atoms; n and m are each 0, 1, 2, 3, or 4; y is 0, 1, or 2; x is 1, 2, 3, or 4; and x-y.gtoreq.1; C) a bulky aluminum alkyl of the formula: AlR.sup.1.sub.x R.sup.2.sub.(3-x) wherein R.sup.1 is a hydrocarbyl group having 1 to 12 carbon atoms; x is an integer from 0 to 2; R.sup.2 is a hydrocarbyl group of the formula --(CH.sub.2).sub.y -- R.sup.3, wherein y is an integer from 1 to 8; and R.sup.3 is a saturated or unsaturated hydrocarbyl group having 3 to 12 carbon atoms containing at least one ring, and D) methylaluminoxane is provided. The catalyst composition may be used to prepare olefin polymers having increased short chain branching frequency.
    • 一种催化剂组合物,其包含A)通过使铝氧烷与惰性载体材料接触并加热到至少约80℃的温度而制备的铝氧烷浸渍的载体; B)下式的茂金属:(L)y(L')MY(x-y-1)其中M是元素周期表IIIB至VIII族的金属; 每个L和L'独立地是与M键合的环二烯基; 每个Y独立地是氢,具有1-20个碳原子的芳基,烷基,烯基,烷基芳基或芳基烷基,具有1-20个碳原子的烃基,卤素,RCO2-或R2N-,其中R是 含有1至约20个碳原子的烃基; n和m各自为0,1,2,3或4; y为0,1或2; x是1,2,3或4; 和x-y> / = 1; C)下式的大体积的烷基铝:AlR 1 R 2(3-x)其中R 1是具有1至12个碳原子的烃基; x是0到2的整数; R 2是式 - (CH 2)y -R 3的烃基,其中y是1至8的整数; R3为含有至少一个环的碳原子数为3〜12的饱和或不饱和烃基,提供D)甲基铝氧烷。 催化剂组合物可用于制备具有增加的短链支化频率的烯烃聚合物。