| 摘要 |
<p>A method for producing an ethylene-based polymer is characterized by the use of a catalyst system comprising, in combination with an organoaluminum compound such as triethyl aluminum, a solid catalytic ingredient prepared by a specific procedure comprising the steps of (a) contacting a mixture composed of a magnesium dialkoxide represented by the general formula Mg(OR<1>)2, in which R<1> is a monovalent hydrocarbon group, and a tetraalkoxide of a metal represented by the general formula M<1> (OR<2>)4, in which M<1> is an atom of titanium or zirconium and R<2> is a monovalent hydrocarbon group, with an alkanol to form a magnesium-containing solid complex, (b) reacting the magnesium-containing solid complex with a tetraalkoxide of a metal represented by the general formula M<2> (OR<4>)4 and/or tetrahalide of a metal represented by the general formula M<2>X<1>4, in which M<2> is an atom of zirconium, when M<1> is a titanium atom, or an atom of titanium, when M<1> is a zirconium atom, R<4> is a monovalent hydrocarbon group and X<1> is a halogen atom, and (c) reacting the reaction product obtained in step (b) above with an alkylaluminum halide represented by the general formula AlR<5>nX<2>3-n, in which R<5> is an alkyl group, X<2> is a halogen atom and n is 1 or 2.</p> |
