| 摘要 |
PURPOSE:To obtain composite polymer as raw material rubber having excellent physical properties and processability by polymerizing butadiene solution with catalysts such as Ba compound and organic Li compound, etc., almost in trans bonding and successively adding organic Li compound and polymerizing in a slight fraction of trans bonding. CONSTITUTION:A monomer mixture solution comprising butadiene and inert solvent (e.g., n-hexane) is prepared and polymerized with a catalyst containing barium, strontium or calcium compound and organic lithium compound or organic magnesium compound at a temperature of 0-150 deg.C, to 70% or more fraction of trans bonding of butadiene, and subsequently, further organic lithium compound is added to said catalyst and polymerized at a temperature of 30-200 deg.C to 60% or less fraction of trans bonding of butadiene, then inert solvent is removed from produced complex polymer to afford the aimed complex polymer. |
