Verfahren zur Herstellung von hohem cis-1,4-Polybutadien

摘要

A catalyst for polymerizing butadiene comprises mixing (A) a nickel carboxylate or an organic complex of nickel, (B) BF3 or an organic complex thereof, and (C) an organoaluminium compound, in a hydrocarbon solvent in the presence of 0.5 to 50 moles of a conjugated diolefin per mole of the nickel compound, and "ageing" the mixture for at least 16 minutes at a temperature from -20 DEG to 120 DEG C. High cis-1,4 polybutadiene is made by contacting butadiene with the above catalyst in a hydrocarbon, under an atmosphere of an inert gas at a temperature ranging between -20 DEG and 150 DEG C. The Specification includes long lists of (A), (B), and (C). The conjugated diolefin may be butadiene, isoprene, or dimethylbutadiene. The polybutadiene is recovered by conventional low-pressure methods. Exemplified catalysts are triethylaluminium, boron trifluoride diethyl ether, nickel naphthenate or stearate or acetacetylethyl nickel, and butadiene.