MODIFIED POLYMERS PREPARED WITH LANTHANIDE-BASED CATALYSTS

摘要

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 catalyts, and reacting the pseudo-living polymer with at least one functionalizing agent defined by the formula (I) or (II) where Z is a substituent that will react or interact with organic or inorganic fillers; R<1> is a single bond or a divalent organic group; R<2> is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R<3> or R<4>; R<3> is a single bond, a divalent organic group, or a trivalent organic group that forms a cyclic organic group with R<2>, R<4>, or R<5>; R<4> is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R<2>, R<3>, or R<5>; R<5> is a monovalent organic group or a divalent organic group that forms a cyclic organic group with R<2>, R<3>, or R<4>; and R<1>, R<2>R<3>, R<4>, R<5> and Z are substituents that will not protonate pseudo-living polymer. Also vulcanizable compositions containing functionalized polymers having filler-interactive substituents that are useful in the production of tires and other industrial products.