Patent ID: 6136931
Filing Date: 2000-10-24
Classification: C08F

Abstract:
A process for preparing polybutadiene which comprises the step of polymerizing 1,3-butadiene in a non-polar solvent using an aging catalyst prepared by aging a mixture of a neodymium compound, an organoaluminum compound and a borontrifluoride complex represented by the formula I, or the formula II, in the presence or absence of a small portion of conjugated diene compounds where the formula I is represented by:BF.sub.3 OR.sub.1 R.sub.2wherein R.sub.1 and R.sub.2, can be the same or different, and are independent substituents, respectively, which are alkyl, cycloalkyl, allyl, aryl or arylalkyl groups containing from 1 to 10 carbon atoms; and the formula II is represented by ##STR3## wherein R.sub.3 is an alkyl group containing from 2 to 10 carbon atoms.