Patent ID: 6451934
Filing Date: 2002-09-17
Classification: C08F

Abstract:
A process for preparation of 1,4-cis polybutadiene which consists of polymerizing 1,3-butadiene in a non-polar solvent using a catalyst, having high activity in stereoregularity and in conversion, prepared by aging a mixture of a neodymium salt, a nickel salt represented by the following formula I, an organoaluminium compound and a borontrifluoride complex represented by the following formula II or formula III in the presence or absence of a conjugated diene compound:Ni(OOCâ€”R)2â€ƒâ€ƒFormula I wherein, R is an alkyl group, a cycloalkyl group, an aryl group or an arylalkyl group containing from 6 to 20 carbon atoms; BF3OR1R2â€ƒâ€ƒFormula II wherein, R1 and R2, which can be the same or different, and are independent substituents, respectively, are alkyl or cycloalkyl groups containing from 1 to 10 carbon atoms; wherein, R3 is a divalent alkyl group containing from 2 to 10 carbon atoms.