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AssigneeNippon Zeon Co., Ltd.
InventorsTakahiko Fukahori, Kiyoshi Inamura
Estimating the term…
A modified polymer prepared by terminally modifying a conjugated diene polymer obtained by polymerization using a lanthanoid-containing catalyst in an organic solvent, with an N-substituted amino active compound, and having Mw of 100,000-1,000,000, a monomodal Mw-distribution, Mw/Mn of 1.3-5, and a terminal modification of at least 50%. The modified polymer is produced by (1) polymerizing a conjugated diene by using a catalyst which is either a mixture of (i) a reaction product of a lanthanoid-containing compound with an organoaluminum hydride and then with a Lewis base, and (ii) a halo-compound, or is a reaction product of (i) with (ii) prepared by reacting a portion of conjugated diene monomer prior to reaction of (ii); and then (2) terminally modifying the obtained living polymer with an N-substituted amino active compound.
A modified conjugated diene polymer obtained by modifying active terminals of a living conjugated diene polymer prepared by a polymerization using a lanthanoid rare earth element-containing compound as a catalyst in an organic solvent, with at least one modifying compound selected from the group consisting of N-substituted aminoketones, N-substituted aminothioketones, N-substituted aminoaldehydes, N-substituted aminothioaldehyde and compounds having a C(.dbd.M)--N<
Dependencies are inferred from the claim text.