Patent ID: 7642322
Filing Date: 2010-01-05
Classification: C08C,C08F,C08K,C08L

Abstract:
1. A method for preparing a functionalized polymer comprising the steps of: preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst wherein the lanthanide-based catalyst comprises (a) a lanthanide compound, (b) an alkyl aluminoxane, and (c) a source of halogen; and reacting the pseudo-living polymer with a functionalizing agent defined by the formula: where R 1 is a divalent bond or divalent organic group comprising from 0 to about 20 carbon atoms, R 2 is a divalent organic group or trivalent organic group in the case where R 2 combines with R 3 to form a cyclic group, R 3 is a hydrogen atom, a monovalent organic group, or, in the case where R 3 combines with R 2 , R 3 may be a divalent organic group, and Z is selected from the group consisting of N,N-disubstituted aminophenyl groups, cyclic amino groups, imine groups, amide groups, isocyanate groups, isothiocyanate groups, and epoxy groups, with the proviso that R 1 , R 2 , R 3 , and Z are substituents that will not protonate a pseudo-living polymer.