| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject polymerization catalyst having high stability in high-temperature polymerization and reproducibility of the catalytic activity and more easily synthesizable for industrial use by combining a tetravalent group 4 metal complex with a metallic compound or a cation generation agent each having respectively specific structure. SOLUTION: This catalyst contains (A) a complex expressed by the formula [M is a group 4 transition metal; Y is C, Si or Ge; R<1> , R<2> , X<1> an X<2> are each a 1-12C alkyl, an alkoxy, an aryl or the like; Z<1> and Z<2> are each N, P or S; Ar<1> and Ar<2> are each an aryl, an aryloxy, silyl or the like; (m) is an integer of 1-5] and preferably further (B) an alkylaluminumoxy compound and/or (C) a cation generation agent. The catalyst preferably further contains an alkylaluminum compound, an alkyl-alkali metal compound or an alkyl-alkaline earth metal compound. |
