| 摘要 |
Disclosed is a catalyst for olefin polymerization, comprising: Component [A]: a prepolymer obtained by olefin prepolymerization on solid titanium catalyst component having an average particle size of 25 to 70 µm produced by contacting of a solid component (i) having an average particle size of 26 to 75 µm, containing magnesium, titanium, halogen, and an electron donor (c 3 ), and being free from detachment of titanium by washing with hexane at 25°C, a polar compound (ii) having a dipole moment of 0.50 to 4.00 Debye, and at least one compound (iii) selected from liquid titanium (d) and an electron donor (e), in which the content of titanium in the solid component (i) is reduced by ‰¥25% by weight, and the weight ratio of the sum of the electron donor (c 3 ) and the electron donor (e) to titanium [electron donor (c 3 +e)/titanium atoms] is ‰¥7;
Component [B]: an organometallic compound; and
Component [C]: an organosilicon compound represented by the following formula (I):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒSi(OR 1 ) 3 (NR 2 R 3 )€ƒ€ƒ€ƒ€ƒ€ƒ(I)
(wherein R 1 is a hydrocarbon group having 1 to 8 carbon atoms, R 2 is a hydrocarbon group having 1 to 12 carbon atoms or hydrogen atom, R 3 is a hydrocarbon group having 1 to 12 carbon atoms). According to the catalyst, an olefin polymer having high stereoregularity and low molecular weight (high fluidity) can be efficiently provided.
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