| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst For producing an olefinic polymer, capable of easily isolating the obtained catalyst in the production of the catalyst, also preventing the adherence of a polymer to a wall of a reaction vessel in producing the polymer by using the catalyst and obtaining the polymer high in bulk density and good in particle shape, and to provide a method for producing the olefinic polymer. SOLUTION: This catalyst for polymerizingα-olefin is obtained by preliminary polymerizing a monomer such as propylene by using a catalytic component consisting of an inorganic oxide such as a silica, a chelate of a transition metal of IVB group of the Periodic table, having a substituted cyclopentadienyl group, etc., and an aluminumoxy compound in a liquid state low boiling point hydrocarbon such as pentane. Then, anα-olefinic polymer is obtained by bringing theα-olefin into contact with the catalyst and performing a main polymerization.
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