Oblon, Fisher, Spivak, McClelland & Maier
Manufacturing method of polyolefin
 A manufacturing method of polyolefin characterized in that at least one kind of olefins is allowed to polymerize in the presence of a catalyst system comprising PA0 (A) solid catalyst ingredient (A) obtained through the successive reaction steps, wherein, with a homogeneous solution involving PA1 (i) at least one member selected from metallic magnesium and hydroxylated organic compounds and oxygen-containing organic compounds of magnesium, and PA1 (ii) at least one kind of oxygen-containing organic compounds of titanium, are allowed to react in sequence with: PA1 (iii) at least one kind of organoaluminum compounds, then PA1 (iv) at least one kind of silicon compounds and further PA1 (V) at least one kind of halogenated aluminum compounds and PA0 (B) at least one kind of catalyst ingredients (B) selected from organometallic compounds, the metal of which belongs to Ia, IIa, IIb, IIIb or IVb group in the periodic table. 
Ioyo Soda Manufacturing Co., Ltd.
C Y
C08F Y10S
inventional additional
Morihiko Mitsuhiro Yozo Toshikazu Hitoshi
Sato Mori Kondo Chikusa Ito