| 摘要 |
F-5641-L An olefin polymerization catalyst composition comprising: (1) a zirconium compound containing pi-bonded organic ligands and having the formula: CpmZrAnXq wherein: Cp represents an unsubstituted or substituted cyclopentadienyl group, m represents 1 or 2 or 3; A represents a halogen or hydrogen atom or a C1-C6 alkyl group, a metalloalkyl group or a group of the formula: or wherein: R represents a C1 to C10 alkyl group, a hydrogen, or halogen atom or a metalloalkyl group; X represents a halogen or hydrogen atom or C1 to C6 alkyl group; n represents 0, 1 or 2; and q represents 0, 1 or 2; providing that q+m+n is equal to the valence of zirconium; and F-5641-L (2) a catalyst activator which comprises a mixture of (i) an organoaluminum compound having the formula: Rp'Al X'(k-p) or R3'Al2 X3' wherein: R' represents a C1 to C6 alkyl group; p represents 1 or 2; X represents a halogen atom; and k represents the valence of aluminum; and (ii) a dialkylmagnesium compound having the formula: Mg Rt''or Mg Rr''R"'(t-r) wherein: R'' represents a C2 to C8 alkyl group; R"' differs from R and represents a C2 to C8 alkyl group; t represents the valence of magnesium; and r represents 0.01 to 1.
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