Patent ID: 6515087
Filing Date: 2003-02-04
Classification: C08F

Abstract:
A process for synthesizing a rubbery polymer that comprises (1) continuously charging (a) a conjugated diolefin monomer, (b) an organolithium compound, and (c) an amine compound into a polymerization zone, wherein the amine compound is selected from the group consisting of alkyl, dialkyl, cycloalkyl or dicycloalkyl amine compounds of the general formula: wherein R represents an alkyl group, a cycloalkyl group, or an alkaryl group containing from 1 to about 12 carbon atoms, and cyclic amine compounds of the general formula: wherein R2 represents a divalent alkylene, bicycloalkane, substituted alkylene, oxy- or N-alkylamino-alkylene group containing from about 3 to about 16 methylene groups, into a polymerization zone; (2) allowing the conjugated diolefin monomer to polymerize in the polymerization zone until a conversion of at least about 85 percent is attained to produce the rubbery polymer; and (3) continuously withdrawing the rubbery polymer from the polymerization zone.