| abstract |
(57) [Summary] A catalyst system for producing an olefin (co) polymer. SOLUTION: a) an organoaluminum compound, b) a compound of a metal belonging to Group IV or VI of the Periodic Table, or c) a reactivating agent having a molar ratio of 0.5 to 100 with respect to the compound b). The activator has the formula Wherein, X is C 1 ~ 6 alkyl or C 1 ~ 6 alkoxy group, Y is Cl, Br, or H, Z is Cl or B is r, and R using a mono- or Jiharokarubon acid alkyl esters of a a] C 1 ~ 6 alkyl group, a catalyst system. |