Patent ID: 8088868

Claim:
A method for preparing a functionalized polymer, the method comprising the steps of: (i) polymerizing conjugated diene monomer by employing a lanthanide-based catalyst to form a reactive polymer having a reactive chain end; and (ii) reacting the reactive chain end with a protected oxime compound selected from the group consisting of formaldehyde O-benzyloxime, acetaldehyde O-benzyloxime, acetaldehyde O-methyloxime, propanal O-benzyloxime, butanal O-methyloxime, pentanal O-methyloxime, cyclopentanecarboxaldehyde O-methyloxime, hexanal O-methyloxime, cyclohexanecarboxaldehyde O-methyloxime, heptanal O-methyloxime, cycloheptanecarboxaldehyde O-methyloxime, octanal O-methyloxime, cyclooctanecarboxaldehyde O-methyloxime, nonanal O-methyloxime, cyclononanecarboxaldehyde O-methyloxime, benzaldehyde O-methyloxime, 2-methoxybenzaldehyde O-methyloxime, 4-diethylaminobenzaldehyde O-methyloxime, 4-diethylaminobenzaldehyde O-benzyloxime, trans-cinnamaldehyde O-benzyloxime, ferrocenecarboxaldehyde O-methyloxime, acetylferrocene O-methyloxime, acetone O-methyloxime, 2-butanone O-methyloxime, 2-pentanone O-methyloxime, 3-pentanone O-methyloxime, 2-hexanone O-methyloxime, 3-hexanone O-methyloxime, 2-heptanone O-methyloxime, 3-heptanone O-methyloxime, 4-heptanone O-methyloxime, 2-octanone O-methyloxime, 3-octanone O-methyloxime, 2-nonanone O-methyloxime, 3-nonanone O-methyloxime, 5-nonanone O-methyloxime, acetophenone O-methyloxime, benzophenone O-methyloxime, 4,4′-bis(diethylamino)benzophenone O-methyloxime, cyclobutanone O-methyloxime, cyclopentanone O-methyloxime, cyclohexanone O-methyloxime, cycloheptanone O-methyloxime, cyclooctanone O-methyloxime, cyclononanone O-methyloxime, cyclodecanone O-methyloxime, cycloundecanone O-methyloxime, cyclododecanone O-methyloxime, and cyclotridecanone O-methyloxime, benzophenone O-methyloxime, 4,4′-bis(diethylamino)benzophenone O-methyloxime, 2-pyridinecarboxaldehyde O-methyloxime, 2-pyridinecarboxaldehyde O-allyloxime, tetrahydrofuran-3-carboxaldehyde O-methyloxime, 2-furancarboxaldehyde O-methyloxime, 3-furancarboxaldehyde O-methyloxime, N-methyl-4-pyrazolecarboxaldehyde O-methyloxime, N-methyl-2-pyrrolecarboxaldehyde O-methyloxime, N-methyl-2-imidazolecarboxaldehyde O-methyloxime, N-methyl-indole-3-carboxaldehyde O-methyloxime, N-methyl-1,2,3-triazole-4-carboxaldehyde O-methyloxime, N-methyl-1,2,4-triazole-3-carboxaldehyde O-methyloxime, pyrazinecarboxaldehyde O-methyloxime, 2-thiazolecarboxaldehyde O-methyloxime, 2-thiophenecarboxaldehyde O-methyloxime, 1,3-dimethyl-2-imidazolidinone O-benzyloxime, 2-acetylthiophene O-methyloxime, 2-acetylthiazole O-methyloxime, 2-acetylpyridine O-methyloxime, 3-acetylpyridine O-methyloxime, 4-acetylpyridine O-methyloxime, bis(2-pyridyl)ketone O-methyloxime, 2-acetyl-1-methylpyrrole O-methyloxime, 3-acetyl-1-methylpyrrole O-methyloxime, and mixtures thereof.