摘要 |
<p>Disclosed is a process for producing polybutene-1 suitable to be molded into pipes and the like by vapor phase polymerization in the presence of a catalyst obtained from (A) a solid catalyst component obtained from a magnesium compound, an electron donating compound and a halide of tetravalent titanium (B) an organoaluminum compound and (C) an electron donor wherein said solid catalyst component (A) has an average particle size of 5-200 mu m, a geometrical standard deviation ( sigma g) of particle size distribution of less than 2.1 and a molar ratio of electron donating compound/magnesium of 0.01 or more and said electron donor (C) is at least one compound selected from the group consisting of a heterocyclic compound represented by the formula: <CHEM> (wherein R<1>, R<2>, R<3>, R<4> and R<5> are as defined before), an ether compound represented by the formula: R6_nC(OR<7>)4-n (2) (wherein R<6> and R<7> and n are as defined before) and an organic peroxide represented by the formula: <CHEM> (wherein R<8>, R<9>, R<1><0> and R<1><1> are as defined), and the vapor phase polymerization is carried out at a molar ratio of hydrogen/butene-1 of 0.001-0.1.</p> |